Accessories

Accessories

G.R.A.S. 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, preamplifiers and outdoor microphones. 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 local representative if you need advice or further information.

G.R.A.S. 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 G.R.A.S. Sound & Vibration directly in Denmark.

  1. Left Anthropometric Pinna
    Anatomically shaped concha and ear canal
    Improved fit and repeatability
    Outer pinna with improved collapsability
    Resilient mounting

    G.R.A.S. KB5001 Left Anthropometric Pinna 35 Shore OO

    KB5001 is a left anthropometric pinna for KEMAR for accurate and repeatable testing of headphones and earphones. It has anatomically correct ear-entrance and ear-canal with correct soft ear helix and provides perfect sealing and insertion accuracy forheadphones and earphones. The hardness is 35 Shore OO

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  2. RA0311 KEMAR Retrofit Kit for Anthropometric Pinna

    G.R.A.S. RA0311 KEMAR Retrofit Kit for Anthropometric Pinna

    G.R.A.S RA0311 is a retrofit kit for fitting anthropometric pinna on a KEMAR previously fitted with standard pinna.

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  3. RA0503 Mounting Adapter for 1/8” Flush-mount Microphone Set
    Material: PPE GF30. (polyphenylenether modified + 30% fibre glass)

    G.R.A.S. RA0503 Mounting Adapter for 1/8” Flush-mount Microphone Set

    The G.R.A.S. RA0503 is a non-conductive mounting adapter for 1/8" flush-mount microphone sets.

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  4. 67TS Turbulence Screen Kit
    Turb. att.: Up to 25 dB*
    Turb. speed: Up to Mach 0.2
    Freq. range (turbulence) 500 Hz - 10 kHz*
    Acoustic att.: Less than 3 dB
    Directivity: ± 60 Deg
    *Depending on flow-speed

    G.R.A.S. 67TS Turbulence Screen Kit

    The G.R.A.S. 67TS Turbulence Screen Kit is designed for aeroacoustic testing in solid-walled wind tunnels. The hydrodynamic component of turbulence is attenuated up to 25 dB. Thereby the acoustic signals of interest can be identified and diagnosed with a reliable resolution.

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  5. RA0502 Mounting Adapter for 1/4” Flush-mount Microphone Set
    Material: PPE GF30. (polyphenylenether modified + 30% fibre glass)

    G.R.A.S. RA0502 Mounting Adapter for 1/4” Flush-mount Microphone Set

    The G.R.A.S. RA0502 is a non-conductive mounting adapter for 1/4" flush-mount microphone sets.

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  6. RA0501 Mounting Adapter for 1/2” Flush-mount Microphone Set
    Material: PPE GF30. (polyphenylenether modified + 30% fibre glass)

    G.R.A.S. RA0501 Mounting Adapter for 1/2” Flush-mount Microphone Set

    The G.R.A.S. RA0501 is a non-conductive mounting adapter for 1/2" flush-mount microphone sets.

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  7. RA0168 Digital Barometer
    Precision barometer which displays (toggle switch):
    - static-pressure correction for a pistonphone
    - the ambient static pressure.

    G.R.A.S. RA0168 Digital Barometer

    This precision barometer has an LCD which can display (toggle button) either the static-pressure correction (e.g. -0.13 dB) for a pistonphone or the ambient static pressure (e.g. 997 hPa).

    This product is intended as optional accessory for pistonphones which as standard has an analogue barometer included i.e. for G.R.A.S. 42AA, 42AC & 42AC-S2. When used for correction of these, the accuracy is improved.

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  8. Right Anthropometric Pinna
    Anatomically shaped concha and ear canal
    Improved fit and repeatability
    Outer pinna with improved collapsability
    Resilient mounting

    G.R.A.S. KB5000 Right Anthropometric Pinna 35 Shore OO

    KB5000 is a right anthropometric pinna for KEMAR for accurate and repeatable testing of headphones and earphones. It has anatomically correct ear-entrance and ear-canal with correct soft ear helix and provides perfect sealing and insertion accuracy for headphones and earphones. The hardness is 35 Shore OO

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  9. RA0016 20 dB Attenuator for externally polarized 1/2" microphones

    Length: 47.5 mm
    Diam.: 12.70 mm

    G.R.A.S. RA0016 20 dB Attenuator for externally polarized 1/2" microphones

    Recommendation: Choose a microphone with low sensitivity instead of using the RA0016.

    The RA0016 is a 20 dB attenuator for inserting between a 1/2" microphone and preamplifier. It will attenuate the output signal of the microphone by 20 dB in order to avoid overloading the preamplifier. The RA0016 is useful when measuring very high sound pressure levels using a preamplifier with limited dynamic range.

     

    The RA0016 will work properly only with externally polarized microphones. For prepolarized microphones, use the RA0018.

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  10. RA0092 Rain-protection Cap for array microphones

    G.R.A.S. RA0092 Rain-protection Cap for array microphones

    Cap for rain protection of G.R.A.S. array microphones G.R.A.S. 40PR and 40PQ. It also fits QC microphones 40PP and 40PK.

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  11. RA0086 Transmitter Adapter for 1/4" microphones

    Length: (excl. connector): 37.5 mm
    Diameter: 6.35 mm
    Material: stainless steel

    G.R.A.S. RA0086 Transmitter Adapter for 1/4" microphones

    The G.R.A.S. RA0086 is similar to the G.R.A.S. RA0067 but is used with a 1/4" externally polarised microphone (typically a G.R.A.S. 40BP) which can then be used as a high-impedance sound source, e.g. when calibrating an acoustic coupler such as the G.R.A.S. RA0045. The RA0086 has a microdot connector.

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  12. RA0073 Adapter for 1" microphone and 1/2" preamplifier

    Length: 63 mm
    The thick end is provided with:
    Inner threading for preamp.: 11.70-60 UNS-2
    Outer threading for mic.: 23.11-60 UNS-2
    Material: stainless steel

    G.R.A.S. RA0073 Adapter for 1" microphone and 1/2" preamplifier

    The RA0073 is an adapter for using a 1˝ microphone with a ½˝ preamplifier.
    The influence of the RA0073 on the acoustic field is minimal.

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  13. RA0067 Transmitter Adapter for 1/2" microphones

    Length (excl. connector): 47.50 mm
    Diam.: 12.70 mm

    G.R.A.S. RA0067 Transmitter Adapter for 1/2" microphones

    The G.R.A.S. RA0067 enables a prepolarized 1/2" microphone (typically a G.R.A.S. 40AD) to be used as a high-impedance sound source.
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  14. RA0063 Adapter for 1/8˝ microphone and 1/4" preamplifier

    Length: 17 mm
    Inner threading for preamp.: 5.70-60 UNS-2
    Outer threading for mic.: M3
    Material: stainless steel

    G.R.A.S. RA0063 Adapter for 1/8" microphone and 1/4" preamplifier

    The RA0063 is an adapter for using a 1/8" microphone with a 1/4" preamplifier. It can be used with any standard 1/8" microphone and 1/4" preamplifier such as the G.R.A.S. 26AC.

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  15. RA0022 1/4" Nosecone

    Length: 36.7 mm
    Outer diameter: 7.0 mm
    Threading (mic. protection grid threading): 6.35-60 UNS-2
    Material: stainless steel
    Weight: 7 g 

    G.R.A.S. RA0022 1/4" Nosecone

    The RA0022 is specially designed and optimized for use with 1/4" microphones for sound pressure measurements, when high speed wind comes from one known direction e.g. in a wind tunnel.
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  16. RA0017 Adapter for 1" microphone and 1/2" preamplifier

    Length: 4 mm
    Diameter: 23.77 mm
    Material: stainless steel

    G.R.A.S. RA0017 Adapter for 1" microphone and 1/2" preamplifier

    The RA0017 is a simple adapter for using a 1" microphone with a 1/2" preamplifier. It can be used with any standard 1" microphone and 1/2" preamplifier such as the G.R.A.S. 26AK.

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  17. RA0018 20 dB Attenuator for prepolarized 1/2" microphones

    Length: 47.5 mm
    Diam.: 12.70 mm

    G.R.A.S. RA0018 20 dB Attenuator for prepolarized 1/2" microphones

    Recommendation: Choose a microphone with low sensitivity instead of using the RA0018.

    RA0018 is a 20 dB attenuator for inserting between a 1/2" prepolarized microphone and preamplifier. It will attenuate the output signal of the microphone by 20 dB in order to avoid overloading of the preamplifier. The RA0018 is useful when measuring very high sound pressure levels using a preamplifier with limited dynamic range.The RA0018 will work properly only with prepolarized microphones. For externally-polarized microphones, use the RA0016.
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  18. RA0006 Right-angled (90º) Adapter for 1/4" Microphone and 1/4" Preamplifier

    Length: 9 mm
    Inner threading for preamp.: 5.70-60 UNS-2
    Outer threading for mic.: 5.70-60 UNS-2
    Material: stainless steel

    G.R.A.S. RA0006 Right-angled (90º) Adapter for 1/4" Microphone and 1/4" Preamplifier

    The RA0006 is a right-angled adapter for using a 1/4" microphone with a 1/4" preamplifier. It can be used with any standard 1/4" microphone and 1/4" preamplifier such as the G.R.A.S. 26AC. The RA0006 could be useful in situations where the microphone has to be flush mounted on a wall.

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  19. RA0003 Adapter for 1/2" microphone and 1/4" preamplifier

    Length: 10 mm
    Inner threading for preamp.: 5.70-60 UNS-2
    Outer threading for mic.: 11.70-60 UNS-2
    Material: stainless steel

    G.R.A.S. RA0003 Adapter for 1/2" microphone and 1/4" preamplifier

    The G.R.A.S. RA0003 is a straight adapter, for placing between a 1/2" microphone and a 1/4" preamplifier.
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  20. RA0001 Right-angled (90º) Adapter for 1/2" microphone and 1/4" preamplifier

    Length: 10 mm
    Inner threading for preamp.: 5.70-60 UNS-2
    Outer threading for mic.: 11.70-60 UNS-2
    Material: stainless steel

    G.R.A.S. RA0001 Right-angled (90º) Adapter for 1/2" microphone and 1/4" preamplifier

    The RA0001 is a right-angled adapter for using a 1/2" microphone with a 1/4" preamplifier. It can be used with any standard 1/2" microphone and 1/4" preamplifier such as the G.R.A.S. 26AC. The RA0001 could be useful in situations where the microphone has to be flush mounted on a wall.

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