GRAS Pinna simulators and accessories for ear simulators
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GRAS Sound & Vibration offers a wide range of standard accessories in the form of cables, adapters, windscreens and tripods for use in measuring set-ups.
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Description
GRAS Sound & Vibration offers a wide range of standard accessories in the form of cables, adapters, windscreens and tripods for use in measuring set-ups. These can be broadly split up under accessories for microphones, for preamplifiers, for outdoor microphones, for pistonphones and pinna simulators and accessories for ear simulators. Some are included with certain products, some are available as extras. All can be ordered individually. The brief descriptions given here as well as those on downloadable accessories sheet will help you to select what you need for your particular set-up. At all events, feel free to contact your GRAS partner if you need advice or further information.
GRAS Sound & Vibration also offers a wide range of special products and customised solutions. Our experience within the field of acoustics and vibration, combined with our short development time, enable us to provide innovative solutions to complex measurement problems in close co-operation with the customer. For a technical discussion of your measurement requirements, please contact your local representative or contact GRAS Sound & Vibration directly in Denmark.
GRAS KB0060 Small Right KEMAR Pinna for 43AG, 45BB and 45BC
GRAS KB0061 Small Left KEMAR Pinna for 45BB and 45BC
The GRAS KB0061 is a Small Left Ear 55 Shore-OO Pinna for KEMAR.
GRAS KB0065 Large Right KEMAR Pinna for 43AG, 45BB and 45BC
The GRAS KB0065 is a Large Right Ear 55 Shore-OO Pinna for KEMAR.
GRAS KB0066 Large Left KEMAR Pinna for 45BB and 45BC
The GRAS KB0066 is a Large Left Ear 55 Shore-OO Pinna for KEMAR.
GRAS KB0068 Small Right KEMAR Pinna for Sound Quality, 55 Shore OO
The GRAS KB0068 is a Small Right Pinna 55 Shore OO pinna for KEMAR configured for sound quality (SQ).
The equivalent left pinna is GRAS KB0069
The equivalent left pinna is GRAS KB0069
GRAS KB0069 Small Left KEMAR Pinna for Sound Quality, 55 Shore OO
The GRAS KB0069 is a Small Left Pinna 55 Shore OO Pinna for KEMAR configured for sound quality (SQ).
The equivalent right pinna is GRAS KB0068
The equivalent right pinna is GRAS KB0068
GRAS KB0070 Large Right KEMAR Pinna for GRAS 45CA
The GRAS KB0070 is a Large Right Ear 55 Shore-OO for GRAS 45CA Hearing-Protector Test Fixture. For installation, you need the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna).
GRAS KB0071 Large Left KEMAR Pinna for GRAS 45CA
The GRAS KB0071 is a Large Left Ear 55 Shore-OO for GRAS Hearing-Protector Test Fixture. For installation, you need the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna).
GRAS KB0072 Small Right KEMAR Pinna for GRAS 45CA
The GRAS KB0072 is a Small Right Ear 55 Shore-OO for GRAS 45CA Hearing-Protector Test Fixture. For installation, you must order the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna).
GRAS KB0073 Small Left KEMAR Pinna for GRAS 45CA
GRAS KB0077 Left KEMAR Pinna for GRAS 45CB
The GRAS KB0077 is a ANSI Pinna Left 55 Shore-OO for GRAS 45CB Acoustic Test Fixture.
GRAS KB0078 Right KEMAR Pinna for GRAS 45CB
The KB0078 is an ANSI Pinna Right 55 Shore-OO for GRAS 45CB Acoustic Test Fixture.
GRAS KB0090 Large Right KEMAR Pinna for 43AG, 45BB and 45BC
The GRAS KB0090 is a Large Right Ear (VA-style) 55 Shore-OO for KEMAR.
GRAS KB0091 Large Left KEMAR Pinna for 45BB and 45BC
The GRAS KB0091 is a Large Left Ear (VA-style) 55 Shore-OO for KEMAR.
GRAS KB0110 Ear-mould simulator
The GRAS KB0110 is an Ear-mould simulator for connecting a GR0917 (canal extension) to a BTE hearing aid via a 2 mm plastic tubing.
Alternatives
The GRAS KB0111 is similar but then via a 3 mm plastic tubing.GRAS KB0111 Ear-mould simulator
The GRAS KB0111 is an Ear-mould simulator for connecting a GR0917 (canal extension) to a BTE hearing aid via a 3 mm plastic tubing.
Alternatives
The GRAS KB0110 is similar but then via a 2 mm plastic tubing.GRAS KB1060 Small Right KEMAR Pinna for 43AG, 45BB and 45BC
The GRAS KB1060 is a Small Right Ear 35 Shore-OO Pinna for KEMAR.
GRAS KB1061 Small Left KEMAR Pinna for 45BB and 45BC
The GRAS KB1061 is a Small Left Ear 35 Shore-OO Pinna for KEMAR.
GRAS KB1065 Large Right KEMAR Pinna for 43AG, 45BB and 45BC
The GRAS KB1065 is a Large Right Ear 35 Shore-OO for KEMAR.
GRAS KB1066 Large Left KEMAR Pinna for 45BB and 45BC
GRAS KB1068 Small Right KEMAR Pinna for Sound Quality, 35 Shore OO
The GRAS KB1068 is a Small Right Pinna 35 Shore OO pinna for KEMAR configured for sound quality (SQ).
The equivalent left pinna is GRAS KB1069
The equivalent left pinna is GRAS KB1069
GRAS KB1069 Small Left KEMAR Pinna for Sound Quality, 35 Shore OO
The GRAS KB1069 is a Small Left Pinna 35 Shore OO Pinna for KEMAR configured for sound quality (SQ).
The equivalent right pinna is GRAS KB1068
The equivalent right pinna is GRAS KB1068
GRAS KB1070 Large Right KEMAR Pinna for GRAS 45CA
The GRAS KB1070 is is a large standardized right pinna made of soft silicone, 35 Shore 00 hardness and gives you the advantages associated with better compliance and collapsibility.The improved collapsibility of the pinna makes it well suited for testing of supra-aural and circumaural headphones.
For installation, the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna) is needed.
For installation, the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna) is needed.
GRAS KB1071 Large Left KEMAR Pinna for GRAS 45CA
The GRAS KB1071 is is a large standardized left pinna made of soft silicone, 35 Shore 00 hardness and gives you the advantages associated with better compliance and collapsibility.The improved collapsibility of the pinna makes it well suited for testing of supra-aural and circumaural headphones.
For installation, the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna) is needed.
For installation, the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna) is needed.
GRAS KB1090 Large Right KEMAR Pinna for 43AG, 45BB and 45BC
The KB1090 is a Large Right Ear (VA-style) 35 Shore-OO Pinna for KEMAR.
GRAS KB1091 Large Left KEMAR Pinna for 45BB and 45BC
The GRAS KB1091 is a Large Left Ear (VA-style) 35 Shore-OO for KEMAR.
GRAS KB5000 Right Anthropometric Pinna 35 Shore OO
KB5000 is a right pinna with anthropometric concha and ear canal for KEMAR. It is made of soft silicone, 35 Shore OO hardness.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsibility of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS KB5001 Left Anthropometric Pinna 35 Shore OO
KB5001 is a left pinna with anthropometric concha and ear canal for KEMAR. It is made of soft silicone, 35 Shore OO hardness.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsibility of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS KB5002 Right Anthropometric Pinna 35 Shore OO
KB5002 is a right pinna with anthropometric concha and ear canal for KEMAR. It is made of soft silicone, 35 Shore OO hardness. It is a mirrored copy of the KB5001 (left) pinna.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsibility of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS KB5010 Right Anthropometric Pinna for 45CA, 35 Shore OO
KB5010 is a right pinna with anthropometric concha and ear canal for 45CA. It is made of soft silicone, 35 Shore OO hardness.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsability of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS KB5011 Left Anthropometric Pinna for 45CA, 35 Shore OO
KB5011 is a left pinna with anthropometric concha and ear canal for 45CA. It is made of soft silicone, 35 Shore OO hardness.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsability of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS RA0052 Test Jig
GRAS RA0058 1/2'' to 1'' Microphone Adapter
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS RA0052 Test Jig
The GRAS RA0052 is for use with GRAS couplers and artificial ears. It has an adjustable spring-loaded arm to exert a variable force on the test object.The design of RA0052 enables mounting of two additional springs, for high-tension setups. These two springs are delivered with the RA0052.
For previous versions of RA0052, designed for two springs only, the GRAS RA0196 High-tension kit is available. This kit, including four springs, is offered for replacement of the top of RA0052.
For previous versions of RA0052, designed for two springs only, the GRAS RA0196 High-tension kit is available. This kit, including four springs, is offered for replacement of the top of RA0052.
GRAS RA0058 1/2'' to 1'' Microphone Adapter
The GRAS RA0058 is a dimension adapter which increases the diameter of a 1/2" microphone to 1". The adapter is relevant for use with GRAS 45CA Hearing-protector test fixture or in other situations where a 1/2" microphone is to be mounted in a 1" inner diameter hole/cylinder.The adapter has an outer thread (23.11-60 UNS-2) for a 1" protection grid.GRAS RA0157 and an inner thread (12.70-60 UNS-2) for the 1/2" microphone (remove the grid).
Note 1: This product is not for GRAS RA0113 IEC 60126 2cc Coupler for 1'' mic. (use RA0116 instead).
Note 2: This product is not for GRAS RA0075 NBS 9A Coupler (use RA0077 or RA0116 with protection grid GR0490 instead).
GRAS RA0070 Test Base for Ear Simulators, Basic
The GRAS RA0070 is a test base for GRAS artificial ears and couplers.
GRAS RA0085 Insulated coupling for artificial ear
Use GRAS RA0085 as a substitute, if necessary, for GRAS GR0336 Snap coupling in the GRAS 43AD Artificial Ear to avoid ground loops. In this case, also replace the 1/2" microphone protection grid with the GRAS RA0091 Inslulated microphone protection grid.
GRAS RA0088 In Ear Adapter
The GRAS RA0088 is a moulding cup used to fit in-ear hearing aids to IEC 60318-4 (60711) RA0045 Ear Simulator.
GRAS RA0114 Adapter for 1/4” button type hearing aids
The GRAS RA0114 is an adapter for 1/4" button type hearing aids and when using 2cc Coupler RA0113.
GRAS RA0115 Moulding adapter for ITE hearing aids
The GRAS RA0115 is a moulding adapter for ITE hearing aids and when using the 2cc Coupler RA0113.
GRAS RA0143 Ear Simulator Holder Kit for KEMAR
GRAS RA0172 Pinna Holder Kit for GRAS 45CA
The GRAS RA0172 Pinna holder kit is used for GRAS 45CA Hearing-Protector Test Fixture when configured with IEC 60318-4 Ear Simulator and KEMAR pinna. Needed for mounting GRAS KB0070 - KB0073 KEMAR Pinnae for GRAS 45CA. The kit contains items for one pinna.
The GRAS RA0176 adapts 1/2" preamplifier to the IEC 60318 Coupler. Designed for use with RA0039 in GRAS 45CA.
Note: Not for Artificial Ear with IEC 60318 Coupler Type 43AA.
Inner tread equal to 1" Pre-amp thread 23.11-60 UNS-2.
GRAS RA0251 KEMAR Retrofit kit for test of Binaural Hearing Aid
This kit is intended for modifying existing KEMAR for test of binaural hearing aids that are based on RF. This kit is factory installed in GRAS 45BB-7, -08 KEMAR Head & Torso for test of binaural HA, 2-ch.
GRAS RA0311 KEMAR Retrofit Kit for Anthropometric Pinna
GRAS RA0501 Mounting Adapter for 1/2” Flush-mount Microphone Set
GRAS RA0502 Mounting Adapter for 1/4” Flush-mount Microphone Set
GRAS RA0503 Mounting Adapter for 1/8” Flush-mount Microphone Set
GRAS RA4800 Adapter for Sensitivity Verification of Flush/Surface Microphones
Note 1: This product is not for GRAS RA0113 IEC 60126 2cc Coupler for 1'' mic. (use RA0116 instead).
Note 2: This product is not for GRAS RA0075 NBS 9A Coupler (use RA0077 or RA0116 with protection grid GR0490 instead).
GRAS RA0070 Test Base for Ear Simulators, Basic
The GRAS RA0070 is a test base for GRAS artificial ears and couplers.
GRAS RA0085 Insulated coupling for artificial ear
Use GRAS RA0085 as a substitute, if necessary, for GRAS GR0336 Snap coupling in the GRAS 43AD Artificial Ear to avoid ground loops. In this case, also replace the 1/2" microphone protection grid with the GRAS RA0091 Inslulated microphone protection grid.
GRAS RA0088 In Ear Adapter
The GRAS RA0088 is a moulding cup used to fit in-ear hearing aids to IEC 60318-4 (60711) RA0045 Ear Simulator.
GRAS RA0114 Adapter for 1/4” button type hearing aids
The GRAS RA0114 is an adapter for 1/4" button type hearing aids and when using 2cc Coupler RA0113.
GRAS RA0115 Moulding adapter for ITE hearing aids
The GRAS RA0115 is a moulding adapter for ITE hearing aids and when using the 2cc Coupler RA0113.
GRAS RA0143 Ear Simulator Holder Kit for KEMAR
The GRAS RA0143 is a retro-fit kit which enables mounting of the IEC 60318-4 (60711) Ear Simulator on KEMAR models earlier than 2005.
It is delivered for one side with two types of ear canal extensions and microphone holders.
It is delivered for one side with two types of ear canal extensions and microphone holders.
- GR0924
- GR0917
- GR0958
- GR1153
GRAS RA0172 Pinna Holder Kit for GRAS 45CA
The GRAS RA0172 Pinna holder kit is used for GRAS 45CA Hearing-Protector Test Fixture when configured with IEC 60318-4 Ear Simulator and KEMAR pinna. Needed for mounting GRAS KB0070 - KB0073 KEMAR Pinnae for GRAS 45CA. The kit contains items for one pinna.
GRAS RA0176 1/2" to 1" Adapter for RA0039
The GRAS RA0176 adapts 1/2" preamplifier to the IEC 60318 Coupler. Designed for use with RA0039 in GRAS 45CA.
Typical use
IEC 60318 Coupler RA0039 in the Hearing-protector Test Fixture Type 45CA(IEC 60318 Coupler RA0039 in Telephone Test Head Type 45AA – but difficult to calibrate. Use Type 43 AD instead).Note: Not for Artificial Ear with IEC 60318 Coupler Type 43AA.
Inner tread equal to 1" Pre-amp thread 23.11-60 UNS-2.
GRAS RA0196 Retrofit High-tension Spring Kit for RA0052
This kit is an option for previous versions (before summer 2014) of RA0052 Artificial Ear Test Jig. In the previous version of RA0052 the arm is designed for two springs only.
If you wish to double the spring force of the previous version of RA0052 then order the kit RA0196. This kit, including four springs, is offered for replacement of the top of RA0052.
If you wish to double the spring force of the previous version of RA0052 then order the kit RA0196. This kit, including four springs, is offered for replacement of the top of RA0052.
GRAS RA0251 KEMAR Retrofit kit for test of Binaural Hearing Aid
This kit is intended for modifying existing KEMAR for test of binaural hearing aids that are based on RF. This kit is factory installed in GRAS 45BB-7, -08 KEMAR Head & Torso for test of binaural HA, 2-ch.
Design
The kit contains Ear Holder Plates made of plastic and Plastic Ear Canal Extensions. These parts replace the corresponding parts of metal and do do not interfere with RF signals.GRAS RA0311 KEMAR Retrofit Kit for Anthropometric Pinna
The GRAS RA0311 KEMAR Retrofit Kit contains the items needed for retrofitting an anthropometric pinna on a KEMAR previously fitted with standard pinna.The kit also contains an Exterior Ear Canal needed for calibration.
Read more about the Anthropometric Pinna here.
The anthropometric pinna is not part of the kit and must be ordered separately.
Read more about the Anthropometric Pinna here.
The anthropometric pinna is not part of the kit and must be ordered separately.
GRAS RA0501 Mounting Adapter for 1/2” Flush-mount Microphone Set
An adapter for each size of flush-mount microphone set is available. The adapters are made from a nonconductive plastic material that provides electrical insulation between microphone and test object. The microphone set is attached to the adapter with an O-ring. This makes installation and removal of the microphone set easy.
The adapter is mechanically strong and can be glued to an object with general types of glue.
The adapter is mechanically strong and can be glued to an object with general types of glue.
GRAS RA0502 Mounting Adapter for 1/4” Flush-mount Microphone Set
An adapter for each size of flush-mount microphone set is available. The adapters are made from a nonconductive plastic material that provides electrical insulation between microphone and test object. The microphone set is attached to the adapter with an O-ring. This makes installation and removal of the microphone set easy.
The adapter is mechanically strong and can be glued to an object with general types of glue.
The adapter is mechanically strong and can be glued to an object with general types of glue.
GRAS RA0503 Mounting Adapter for 1/8” Flush-mount Microphone Set
An adapter for each size of flush-mount microphone set is available. The adapters are made from a nonconductive plastic material that provides electrical insulation between microphone and test object. The microphone set is attached to the adapter with an O-ring. This makes installation and removal of the microphone set easy.
The adapter is mechanically strong and can be glued to an object with general types of glue.
The adapter is mechanically strong and can be glued to an object with general types of glue.
GRAS RA4800 Adapter for Sensitivity Verification of Flush/Surface Microphones
RA4800 is a field verification adapter for UTP, surface-mount, and flush-mount microphones.With this adapter, it is possible to perform quick and reliable verification without having to demount the microphone.The diameter of the adapter is wide enough to accommodate all GRAS fairings for UTP and surface-mount microphones.
The adapter fits sound calibrators and pistonphones fitted with 1" collar.A soft cushion similar to those found on circumaural headphones provides a closed cavity, four distance spacers (legs) make it easy to hold the calibrator stable during the verification. Also, they ensure that the volume stays the same during the verification and that the same volume can be achieved in future tests.
It is designed for verification at 250 Hz. The precision is within ± 0.3 dB.
The adapter fits sound calibrators and pistonphones fitted with 1" collar.A soft cushion similar to those found on circumaural headphones provides a closed cavity, four distance spacers (legs) make it easy to hold the calibrator stable during the verification. Also, they ensure that the volume stays the same during the verification and that the same volume can be achieved in future tests.It is designed for verification at 250 Hz. The precision is within ± 0.3 dB.
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GRAS Sound & Vibration offers a wide range of standard accessories in the form of cables, adapters, windscreens and tripods for use in measuring set-ups. These can be broadly split up under accessories for microphones, for preamplifiers, for outdoor microphones, for pistonphones and pinna simulators and accessories for ear simulators. Some are included with certain products, some are available as extras. All can be ordered individually. The brief descriptions given here as well as those on downloadable accessories sheet will help you to select what you need for your particular set-up. At all events, feel free to contact your GRAS partner if you need advice or further information.
GRAS Sound & Vibration also offers a wide range of special products and customised solutions. Our experience within the field of acoustics and vibration, combined with our short development time, enable us to provide innovative solutions to complex measurement problems in close co-operation with the customer. For a technical discussion of your measurement requirements, please contact your local representative or contact GRAS Sound & Vibration directly in Denmark.
GRAS KB0060 Small Right KEMAR Pinna for 43AG, 45BB and 45BC
GRAS KB0061 Small Left KEMAR Pinna for 45BB and 45BC
The GRAS KB0061 is a Small Left Ear 55 Shore-OO Pinna for KEMAR.
GRAS KB0065 Large Right KEMAR Pinna for 43AG, 45BB and 45BC
The GRAS KB0065 is a Large Right Ear 55 Shore-OO Pinna for KEMAR.
GRAS KB0066 Large Left KEMAR Pinna for 45BB and 45BC
The GRAS KB0066 is a Large Left Ear 55 Shore-OO Pinna for KEMAR.
GRAS KB0068 Small Right KEMAR Pinna for Sound Quality, 55 Shore OO
The GRAS KB0068 is a Small Right Pinna 55 Shore OO pinna for KEMAR configured for sound quality (SQ).
The equivalent left pinna is GRAS KB0069
The equivalent left pinna is GRAS KB0069
GRAS KB0069 Small Left KEMAR Pinna for Sound Quality, 55 Shore OO
The GRAS KB0069 is a Small Left Pinna 55 Shore OO Pinna for KEMAR configured for sound quality (SQ).
The equivalent right pinna is GRAS KB0068
The equivalent right pinna is GRAS KB0068
GRAS KB0070 Large Right KEMAR Pinna for GRAS 45CA
The GRAS KB0070 is a Large Right Ear 55 Shore-OO for GRAS 45CA Hearing-Protector Test Fixture. For installation, you need the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna).
GRAS KB0071 Large Left KEMAR Pinna for GRAS 45CA
The GRAS KB0071 is a Large Left Ear 55 Shore-OO for GRAS Hearing-Protector Test Fixture. For installation, you need the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna).
GRAS KB0072 Small Right KEMAR Pinna for GRAS 45CA
The GRAS KB0072 is a Small Right Ear 55 Shore-OO for GRAS 45CA Hearing-Protector Test Fixture. For installation, you must order the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna).
GRAS KB0073 Small Left KEMAR Pinna for GRAS 45CA
GRAS KB0077 Left KEMAR Pinna for GRAS 45CB
The GRAS KB0077 is a ANSI Pinna Left 55 Shore-OO for GRAS 45CB Acoustic Test Fixture.
GRAS KB0078 Right KEMAR Pinna for GRAS 45CB
The KB0078 is an ANSI Pinna Right 55 Shore-OO for GRAS 45CB Acoustic Test Fixture.
GRAS KB0090 Large Right KEMAR Pinna for 43AG, 45BB and 45BC
The GRAS KB0090 is a Large Right Ear (VA-style) 55 Shore-OO for KEMAR.
GRAS KB0091 Large Left KEMAR Pinna for 45BB and 45BC
The GRAS KB0091 is a Large Left Ear (VA-style) 55 Shore-OO for KEMAR.
GRAS KB0110 Ear-mould simulator
The GRAS KB0110 is an Ear-mould simulator for connecting a GR0917 (canal extension) to a BTE hearing aid via a 2 mm plastic tubing.
Alternatives
The GRAS KB0111 is similar but then via a 3 mm plastic tubing.GRAS KB0111 Ear-mould simulator
The GRAS KB0111 is an Ear-mould simulator for connecting a GR0917 (canal extension) to a BTE hearing aid via a 3 mm plastic tubing.
Alternatives
The GRAS KB0110 is similar but then via a 2 mm plastic tubing.GRAS KB1060 Small Right KEMAR Pinna for 43AG, 45BB and 45BC
The GRAS KB1060 is a Small Right Ear 35 Shore-OO Pinna for KEMAR.
GRAS KB1061 Small Left KEMAR Pinna for 45BB and 45BC
The GRAS KB1061 is a Small Left Ear 35 Shore-OO Pinna for KEMAR.
GRAS KB1065 Large Right KEMAR Pinna for 43AG, 45BB and 45BC
The GRAS KB1065 is a Large Right Ear 35 Shore-OO for KEMAR.
GRAS KB1066 Large Left KEMAR Pinna for 45BB and 45BC
GRAS KB1068 Small Right KEMAR Pinna for Sound Quality, 35 Shore OO
The GRAS KB1068 is a Small Right Pinna 35 Shore OO pinna for KEMAR configured for sound quality (SQ).
The equivalent left pinna is GRAS KB1069
The equivalent left pinna is GRAS KB1069
GRAS KB1069 Small Left KEMAR Pinna for Sound Quality, 35 Shore OO
The GRAS KB1069 is a Small Left Pinna 35 Shore OO Pinna for KEMAR configured for sound quality (SQ).
The equivalent right pinna is GRAS KB1068
The equivalent right pinna is GRAS KB1068
GRAS KB1070 Large Right KEMAR Pinna for GRAS 45CA
The GRAS KB1070 is is a large standardized right pinna made of soft silicone, 35 Shore 00 hardness and gives you the advantages associated with better compliance and collapsibility.The improved collapsibility of the pinna makes it well suited for testing of supra-aural and circumaural headphones.
For installation, the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna) is needed.
For installation, the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna) is needed.
GRAS KB1071 Large Left KEMAR Pinna for GRAS 45CA
The GRAS KB1071 is is a large standardized left pinna made of soft silicone, 35 Shore 00 hardness and gives you the advantages associated with better compliance and collapsibility.The improved collapsibility of the pinna makes it well suited for testing of supra-aural and circumaural headphones.
For installation, the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna) is needed.
For installation, the GRAS RA0172 Pinna Holder Kit for GRAS 45CA (one kit per pinna) is needed.
GRAS KB1090 Large Right KEMAR Pinna for 43AG, 45BB and 45BC
The KB1090 is a Large Right Ear (VA-style) 35 Shore-OO Pinna for KEMAR.
GRAS KB1091 Large Left KEMAR Pinna for 45BB and 45BC
The GRAS KB1091 is a Large Left Ear (VA-style) 35 Shore-OO for KEMAR.
GRAS KB5000 Right Anthropometric Pinna 35 Shore OO
KB5000 is a right pinna with anthropometric concha and ear canal for KEMAR. It is made of soft silicone, 35 Shore OO hardness.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsibility of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS KB5001 Left Anthropometric Pinna 35 Shore OO
KB5001 is a left pinna with anthropometric concha and ear canal for KEMAR. It is made of soft silicone, 35 Shore OO hardness.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsibility of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS KB5002 Right Anthropometric Pinna 35 Shore OO
KB5002 is a right pinna with anthropometric concha and ear canal for KEMAR. It is made of soft silicone, 35 Shore OO hardness. It is a mirrored copy of the KB5001 (left) pinna.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsibility of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS KB5010 Right Anthropometric Pinna for 45CA, 35 Shore OO
KB5010 is a right pinna with anthropometric concha and ear canal for 45CA. It is made of soft silicone, 35 Shore OO hardness.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsability of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS KB5011 Left Anthropometric Pinna for 45CA, 35 Shore OO
KB5011 is a left pinna with anthropometric concha and ear canal for 45CA. It is made of soft silicone, 35 Shore OO hardness.The external shape of the pinna is identical to that of the standardized KEMAR pinna, but concha and canal have been modified so that they closely mimic the properties of a real human ear. The ear canal has been extended and is an integral part of the pinna that now seals directly against the ear simulator. Like the human ear, the ear canal now has the 1st and 2nd bend, and the interface with the concha is oval.This shape makes it possible to achieve good insertion accuracy and sealing with anatomically shaped in-ear transducers such as ear-bud headphones, in-ear hearing protectors, and insert hearing aids. Controlling the insertion depth is easy, leading to better insertion consistency and improved repeatability of measurements. The better fit and seal also means that the low frequency response is improved. It will allow you to reproduce base response, as well as effectively measure (active & passive) attenuation.The outer pinna has the same shape as the standardized pinna, but the flexibility has been improved to better mimic the way the human ear collapses when supra-aural and circum-aural earphones are mounted. When measuring the frequency response of these types of headphones, more reliable and repeatable measurements can be achieved because of the improved collapsability of the pinna.
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS RA0052 Test Jig
GRAS RA0058 1/2'' to 1'' Microphone Adapter
The pinna is screwed onto the ear simulator which in turn is fixed with screws that ensure that the pinna is held firmly in place. Therefore, the mounting is very stable, and it is possible to mount and dismount DUTs repeatedly without compromising the seal.
GRAS RA0052 Test Jig
The GRAS RA0052 is for use with GRAS couplers and artificial ears. It has an adjustable spring-loaded arm to exert a variable force on the test object.The design of RA0052 enables mounting of two additional springs, for high-tension setups. These two springs are delivered with the RA0052.
For previous versions of RA0052, designed for two springs only, the GRAS RA0196 High-tension kit is available. This kit, including four springs, is offered for replacement of the top of RA0052.
For previous versions of RA0052, designed for two springs only, the GRAS RA0196 High-tension kit is available. This kit, including four springs, is offered for replacement of the top of RA0052.
GRAS RA0058 1/2'' to 1'' Microphone Adapter
The GRAS RA0058 is a dimension adapter which increases the diameter of a 1/2" microphone to 1". The adapter is relevant for use with GRAS 45CA Hearing-protector test fixture or in other situations where a 1/2" microphone is to be mounted in a 1" inner diameter hole/cylinder.The adapter has an outer thread (23.11-60 UNS-2) for a 1" protection grid.GRAS RA0157 and an inner thread (12.70-60 UNS-2) for the 1/2" microphone (remove the grid).
Note 1: This product is not for GRAS RA0113 IEC 60126 2cc Coupler for 1'' mic. (use RA0116 instead).
Note 2: This product is not for GRAS RA0075 NBS 9A Coupler (use RA0077 or RA0116 with protection grid GR0490 instead).
GRAS RA0070 Test Base for Ear Simulators, Basic
The GRAS RA0070 is a test base for GRAS artificial ears and couplers.
GRAS RA0085 Insulated coupling for artificial ear
Use GRAS RA0085 as a substitute, if necessary, for GRAS GR0336 Snap coupling in the GRAS 43AD Artificial Ear to avoid ground loops. In this case, also replace the 1/2" microphone protection grid with the GRAS RA0091 Inslulated microphone protection grid.
GRAS RA0088 In Ear Adapter
The GRAS RA0088 is a moulding cup used to fit in-ear hearing aids to IEC 60318-4 (60711) RA0045 Ear Simulator.
GRAS RA0114 Adapter for 1/4” button type hearing aids
The GRAS RA0114 is an adapter for 1/4" button type hearing aids and when using 2cc Coupler RA0113.
GRAS RA0115 Moulding adapter for ITE hearing aids
The GRAS RA0115 is a moulding adapter for ITE hearing aids and when using the 2cc Coupler RA0113.
GRAS RA0143 Ear Simulator Holder Kit for KEMAR
GRAS RA0172 Pinna Holder Kit for GRAS 45CA
The GRAS RA0172 Pinna holder kit is used for GRAS 45CA Hearing-Protector Test Fixture when configured with IEC 60318-4 Ear Simulator and KEMAR pinna. Needed for mounting GRAS KB0070 - KB0073 KEMAR Pinnae for GRAS 45CA. The kit contains items for one pinna.
The GRAS RA0176 adapts 1/2" preamplifier to the IEC 60318 Coupler. Designed for use with RA0039 in GRAS 45CA.
Note: Not for Artificial Ear with IEC 60318 Coupler Type 43AA.
Inner tread equal to 1" Pre-amp thread 23.11-60 UNS-2.
GRAS RA0251 KEMAR Retrofit kit for test of Binaural Hearing Aid
This kit is intended for modifying existing KEMAR for test of binaural hearing aids that are based on RF. This kit is factory installed in GRAS 45BB-7, -08 KEMAR Head & Torso for test of binaural HA, 2-ch.
GRAS RA0311 KEMAR Retrofit Kit for Anthropometric Pinna
GRAS RA0501 Mounting Adapter for 1/2” Flush-mount Microphone Set
GRAS RA0502 Mounting Adapter for 1/4” Flush-mount Microphone Set
GRAS RA0503 Mounting Adapter for 1/8” Flush-mount Microphone Set
GRAS RA4800 Adapter for Sensitivity Verification of Flush/Surface Microphones
Note 1: This product is not for GRAS RA0113 IEC 60126 2cc Coupler for 1'' mic. (use RA0116 instead).
Note 2: This product is not for GRAS RA0075 NBS 9A Coupler (use RA0077 or RA0116 with protection grid GR0490 instead).
GRAS RA0070 Test Base for Ear Simulators, Basic
The GRAS RA0070 is a test base for GRAS artificial ears and couplers.
GRAS RA0085 Insulated coupling for artificial ear
Use GRAS RA0085 as a substitute, if necessary, for GRAS GR0336 Snap coupling in the GRAS 43AD Artificial Ear to avoid ground loops. In this case, also replace the 1/2" microphone protection grid with the GRAS RA0091 Inslulated microphone protection grid.
GRAS RA0088 In Ear Adapter
The GRAS RA0088 is a moulding cup used to fit in-ear hearing aids to IEC 60318-4 (60711) RA0045 Ear Simulator.
GRAS RA0114 Adapter for 1/4” button type hearing aids
The GRAS RA0114 is an adapter for 1/4" button type hearing aids and when using 2cc Coupler RA0113.
GRAS RA0115 Moulding adapter for ITE hearing aids
The GRAS RA0115 is a moulding adapter for ITE hearing aids and when using the 2cc Coupler RA0113.
GRAS RA0143 Ear Simulator Holder Kit for KEMAR
The GRAS RA0143 is a retro-fit kit which enables mounting of the IEC 60318-4 (60711) Ear Simulator on KEMAR models earlier than 2005.
It is delivered for one side with two types of ear canal extensions and microphone holders.
It is delivered for one side with two types of ear canal extensions and microphone holders.
- GR0924
- GR0917
- GR0958
- GR1153
GRAS RA0172 Pinna Holder Kit for GRAS 45CA
The GRAS RA0172 Pinna holder kit is used for GRAS 45CA Hearing-Protector Test Fixture when configured with IEC 60318-4 Ear Simulator and KEMAR pinna. Needed for mounting GRAS KB0070 - KB0073 KEMAR Pinnae for GRAS 45CA. The kit contains items for one pinna.
GRAS RA0176 1/2" to 1" Adapter for RA0039
The GRAS RA0176 adapts 1/2" preamplifier to the IEC 60318 Coupler. Designed for use with RA0039 in GRAS 45CA.
Typical use
IEC 60318 Coupler RA0039 in the Hearing-protector Test Fixture Type 45CA(IEC 60318 Coupler RA0039 in Telephone Test Head Type 45AA – but difficult to calibrate. Use Type 43 AD instead).Note: Not for Artificial Ear with IEC 60318 Coupler Type 43AA.
Inner tread equal to 1" Pre-amp thread 23.11-60 UNS-2.
GRAS RA0196 Retrofit High-tension Spring Kit for RA0052
This kit is an option for previous versions (before summer 2014) of RA0052 Artificial Ear Test Jig. In the previous version of RA0052 the arm is designed for two springs only.
If you wish to double the spring force of the previous version of RA0052 then order the kit RA0196. This kit, including four springs, is offered for replacement of the top of RA0052.
If you wish to double the spring force of the previous version of RA0052 then order the kit RA0196. This kit, including four springs, is offered for replacement of the top of RA0052.
GRAS RA0251 KEMAR Retrofit kit for test of Binaural Hearing Aid
This kit is intended for modifying existing KEMAR for test of binaural hearing aids that are based on RF. This kit is factory installed in GRAS 45BB-7, -08 KEMAR Head & Torso for test of binaural HA, 2-ch.
Design
The kit contains Ear Holder Plates made of plastic and Plastic Ear Canal Extensions. These parts replace the corresponding parts of metal and do do not interfere with RF signals.GRAS RA0311 KEMAR Retrofit Kit for Anthropometric Pinna
The GRAS RA0311 KEMAR Retrofit Kit contains the items needed for retrofitting an anthropometric pinna on a KEMAR previously fitted with standard pinna.The kit also contains an Exterior Ear Canal needed for calibration.
Read more about the Anthropometric Pinna here.
The anthropometric pinna is not part of the kit and must be ordered separately.
Read more about the Anthropometric Pinna here.
The anthropometric pinna is not part of the kit and must be ordered separately.
GRAS RA0501 Mounting Adapter for 1/2” Flush-mount Microphone Set
An adapter for each size of flush-mount microphone set is available. The adapters are made from a nonconductive plastic material that provides electrical insulation between microphone and test object. The microphone set is attached to the adapter with an O-ring. This makes installation and removal of the microphone set easy.
The adapter is mechanically strong and can be glued to an object with general types of glue.
The adapter is mechanically strong and can be glued to an object with general types of glue.
GRAS RA0502 Mounting Adapter for 1/4” Flush-mount Microphone Set
An adapter for each size of flush-mount microphone set is available. The adapters are made from a nonconductive plastic material that provides electrical insulation between microphone and test object. The microphone set is attached to the adapter with an O-ring. This makes installation and removal of the microphone set easy.
The adapter is mechanically strong and can be glued to an object with general types of glue.
The adapter is mechanically strong and can be glued to an object with general types of glue.
GRAS RA0503 Mounting Adapter for 1/8” Flush-mount Microphone Set
An adapter for each size of flush-mount microphone set is available. The adapters are made from a nonconductive plastic material that provides electrical insulation between microphone and test object. The microphone set is attached to the adapter with an O-ring. This makes installation and removal of the microphone set easy.
The adapter is mechanically strong and can be glued to an object with general types of glue.
The adapter is mechanically strong and can be glued to an object with general types of glue.
GRAS RA4800 Adapter for Sensitivity Verification of Flush/Surface Microphones
RA4800 is a field verification adapter for UTP, surface-mount, and flush-mount microphones.With this adapter, it is possible to perform quick and reliable verification without having to demount the microphone.The diameter of the adapter is wide enough to accommodate all GRAS fairings for UTP and surface-mount microphones.
The adapter fits sound calibrators and pistonphones fitted with 1" collar.A soft cushion similar to those found on circumaural headphones provides a closed cavity, four distance spacers (legs) make it easy to hold the calibrator stable during the verification. Also, they ensure that the volume stays the same during the verification and that the same volume can be achieved in future tests.
It is designed for verification at 250 Hz. The precision is within ± 0.3 dB.
The adapter fits sound calibrators and pistonphones fitted with 1" collar.A soft cushion similar to those found on circumaural headphones provides a closed cavity, four distance spacers (legs) make it easy to hold the calibrator stable during the verification. Also, they ensure that the volume stays the same during the verification and that the same volume can be achieved in future tests.It is designed for verification at 250 Hz. The precision is within ± 0.3 dB.