Accessories

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, 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.

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 RA0018 20 dB Attenuator for prepolarized 1/2" microphones

Length: 47.5 mm
Diam.: 12.70 mm

GRAS 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 preampli..

GRAS RA0019 Adapter for 1/4" microphone and 1/2" preamplifier

Length: 70 mm
Inner threading for preamp.: 11.70-60 UNS-2
Outer threading for mic.: 5.70-60 UNS-2
Material: stainless steel

GRAS RA0019 Adapter for 1/4" microphone and 1/2" preamplifier

The RA0019 is an adapter for using a 1/4" microphone with a 1/2" preamplifier. Its influence on the acoustic field is minimal. To reduce attenuation of the microphone signal, the guard ring of the preamplifier is extended through the RA0019. ..

GRAS RA0020 1/2" Nosecone

Length: 54.0 mm
Outer diameter: 13.2 mm
Threading (mic. protection grid threading): 12.70-60 UNS-2
Material: Stainless steel
Weight: 45 g

GRAS RA0020 1/2" Nosecone

The RA0020 is specially designed and optimized for use with 1/2" microphones for sound pressure measurements, when high speed wind comes from one known direction e.g. in a wind tunnel...

GRAS RA0020-A 1/2" Nosecone, lightweight

Length: 54.0 mm
Outer diameter: 13.0 mm
Threading (mic. protection grid threading): 12.70-60 UNS-2
Material: Aluminum (black anodized)
Weight: 15 g

GRAS RA0020-A 1/2" Nosecone, lightweight

RA0020-A is a nosecone for 1/2" microphones. It is similar to RA0020 but made of aluminium for lightness...

GRAS 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 

GRAS 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...

GRAS RA0023 Coupler for 1" microphones

GRAS RA0023 Coupler for 1" microphones

Coupler for 1” microphones. For use with GRAS pistonphones...

GRAS RA0024 Coupler for two-port Calibration

GRAS RA0024 Coupler for two-port Calibration

Two-port coupler for 1/2” microphones. Used in comparison calibrations between two 1/2” microphones; one of which is a reference microphone. It can also be used in measuring the P-I (Pressure-Intensity) Index of intensity probes at 250 Hz. For use with GRAS 42AA & 42AP Pistonpho..

GRAS RA0041 Adapter for Pistonphone calibration
Material: Black POM

GRAS RA0041 Adapter for Pistonphone calibration

The RA0041 is an adapter for calibrating the GRAS 41CN Outdoor Microphone System . It fits over the rain protection cap of the 41CN and permits in-situ calibration using a Pistonphone such as the 42AA or a Calibrator such as the 42AB...

GRAS RA0042 Coupler for two-port Calibration

GRAS RA0042 Coupler for two-port Calibration

Two-port high-pressure coupler for 1/2” microphones. Used in comparison calibrations between two 1/2” microphones; one of which is a reference microphone. It can also be used in measuring the P-I (Pressure-Intensity) Index of intensity probes at 250 Hz. For use with GRAS 42AC Piston..

GRAS RA0048 Pistonphone coupler

GRAS RA0048 Pistonphone coupler

Pistonphone coupler which is factory mounted on GRAS Pistonphone and they are factory calibrated as one unit...

GRAS RA0049 Microphone adapter for pistonphones
Material: Black POM

GRAS RA0049 Microphone adapter for pistonphones

Adapter for GRAS  1/4" and 7 mm microphones when calibrating using GRAS Pistonphones and Sound Calibrator...

GRAS RA0052 Test Jig

GRAS RA0052 Test Jig

For use with GRAS couplers and artificial ears. It has an adjustable spring-loaded arm to exert a variable force on the test object...