For pistonphones

For pistonphones

  1. OP0023 Kit for Sensitivity Calibration of Flush-mount Microphone Sets

    G.R.A.S. OP0023 Kit for Sensitivity Calibration of Flush-mount Microphone Sets

    The G.R.A.S. OP0023 contains calibration adapters for 1/2”, 1/4" and 1/8” sizes of  G.R.A.S. Flush-mount Microphone Sets.

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  2. OP0025 Kit for Sensitivity Calibration of 1/4" Surface Microphones

    G.R.A.S. OP0025 Kit for Sensitivity Calibration of 1/4" Surface Microphones

    The G.R.A.S. OP0025 kit contains a calibration adapter for G.R.A.S 1/4" precision Surface Microphones.

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  3. /

    Adapter for field-verification

    G.R.A.S. RA0216 Field verification adapter for 67AX/AD

    This is a pistonphone adapter which is designed for field verification of the 1/2" flush-mount microphone included in G.R.A.S. 67AX/67AD Ground Array Microphone kits.

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  4. /

    G.R.A.S. RA0157 1/2" Calibration Adapter for KEMAR Pinna

    Adapter for Pistonphone calibrating a G.R.A.S. RA0045 Ear Simulator with a KEMAR Ear Canal extension.

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  5. RA0072 Octopus coupler

    G.R.A.S. RA0072 Octopus coupler

    Octopus couplers for calibrating up to eight 1/2" microphones simultaneously.

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  6. RA0023 Coupler for 1” microphones

    G.R.A.S. RA0023 Coupler for 1" microphones

    Coupler for 1” microphones. For use with G.R.A.S. pistonphones.

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  7. RA0042 Coupler for two-port Calibration

    G.R.A.S. 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 Pistonphone Type 42AC.

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  8. RA0024 Coupler for two-port Calibration

    G.R.A.S. 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 G.R.A.S. 42AA & 42AP Pistonphones.

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  9. RA0060 Calibration Coupler for 1/2” Nosecone

    G.R.A.S. RA0060 Calibration Coupler for 1/2” Nosecone

    For use when calibrating a microphone fitted with a 1/2” nosecone RA0020 using a G.R.A.S. pistonphone like 42AA.

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  10. RA0069 Microphone adapter for pistonphones

    G.R.A.S. RA0069 Microphone adapter for pistonphones

    1/2" Adapter for 1/8" microphones when calibrating using G.R.A.S. pistonphones and Sound Calibrator.

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  11. RA0049 Microphone adapter for pistonphones

    G.R.A.S. RA0049 Microphone adapter for pistonphones

    Adapter for G.R.A.S.  1/4" and 7 mm microphones when calibrating using G.R.A.S. Pistonphones and Sound Calibrator.

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  12. RA0048 Pistonphone coupler

    G.R.A.S. RA0048 Pistonphone coupler

    Pistonphone coupler which is factory mounted on G.R.A.S. Pistonphone and they are factory calibrated as one unit.

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  13. RA0119 Pistonphone Adapter

    G.R.A.S. RA0119 Pistonphone Adapter

    A pistonphone adapter for calibration checking the Ear Simulator Type 43AE when a pinna simulator is mounted on the IEC 60711 Ear Simulator RA0045.

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  14. RA0090 Pistonphone Coupler

    G.R.A.S. RA0090 Pistonphone Coupler

    A larger-volume coupler for enabling G.R.A.S. 42AA/AP Pistonphone to produce a sound pressure level of 94 dB instead of 114 dB re. 20 μPa. Essential when calibrating highly sensitive, G.R.A.S. low noise measuring systems.
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  15. RA0168 Digital Barometer

    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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