For pistonphones

GRAS OP0023 Kit for Sensitivity Calibration of Flush-mount Microphone Sets

GRAS OP0023 Kit for Sensitivity Calibration of Flush-mount Microphone Sets

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

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

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

The GRAS OP0025 kit contains a calibration adapter for GRAS 1/4" precision Surface Microphones...

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 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 RA0060 Calibration Coupler for 1/2” Nosecone

GRAS RA0060 Calibration Coupler for 1/2” Nosecone

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

GRAS RA0069 Microphone adapter for pistonphones
Material: Black POM

GRAS RA0069 Microphone adapter for pistonphones

1/2" Adapter for 1/8" microphones when calibrating using GRAS pistonphones and Sound Calibrator...

GRAS RA0072 Octopus coupler

GRAS RA0072 Octopus coupler

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

GRAS RA0090 Pistonphone Coupler

GRAS RA0090 Pistonphone Coupler

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

GRAS RA0119 Pistonphone Adapter
Material: Black POM

GRAS 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...