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G.R.A.S. 40AU 1/2" Ext. Polarized Reference Pressure Microphone - 5 Pages

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Catalogue excerpts

G.R.A.S. 40AU 1/2" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 1 of 5 G.R.A.S. 40AU 1/2" Ext. Polarized Reference Pressure Microphone Sensitivity: 12.5 mV/Pa Freq resp: 3.15 Hz to 20 kHz Dynamic range: 20 dBA to 154 dB The 40AU is an IEC 61094 LS2aP ½" externally polarized reference microphone that is rear-vented. It is a ½" laboratory-standard pressure microphone that is ideal for precision sound pressure measurements. It has a front cavity as specified in IEC 61094-2 and is supplied with a protective dust cap. 40AU is individually factory-calibrated and delivered with a calibration chart stating its specific open-circuit sensitivity and pressure frequency response. Introduction The 40AU is an IEC 61094 LS2aP ½" externally polarized reference microphone that is rear-vented. It is a ½" laboratory-standard pressure microphone that is ideal for precision sound pressure measurements. It has a front cavity as specified in IEC 61094-2 and is supplied with a protective dust cap. 40AU is individually factory-calibrated and delivered with a calibration chart stating its specific open-circuit sensitivity and pressure frequency response.

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G.R.A.S. 40AU 1/2" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 2 of 5 Typical applications and use The 40AU can be used for precision sound pressure measurements, calibrations at high frequencies, laboratory reference measurements, and measurements in couplers and ear simulators. The 40AU can be used in couplers, ear simulators, enclosures, and at boundaries. Compatibility The 40AU requires a standardized ½" LEMO preamplifier and an input module that supports this technology with a 7-pin LEMO connector. For more information, see System Setup. System verification For daily...

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G.R.A.S. 40AU 1/2" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 3 of 5 Depending on the use, measurement environment, and internal quality control programs, we recommend recalibrating the microphone at least once a year. Learn more about G.R.A.S.' calibration services. Specification Open-circuit sensitivity @ 250 Hz (±2 dB) Resonance frequency Dynamic range lower limit (microphone thermal noise) Dynamic range upper limit Dynamic lower limit with G.R.A.S. preamplifier Dynamic range upper limit with G.R.A.S. preamplifier @ ±14 V / +28 V power supply Dynamic range upper limit...

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G.R.A.S. 40AU 1/2" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 4 of 5 Influence of axial vibration @1 m/s² CE/RoHS compliant, WEEE registered Weight

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G.R.A.S. 40AU 1/2" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 5 of 5 Tradition Since the establishment in 1994, G.R.A.S. have been 100% dedicated to developing and manufacturing high-quality measurement microphones and related acoustic equipment. Founded by the Danish acoustics pioneer Gunnar Rasmussen who for more than 60 years has contributed to the world of sound and vibration with his unique ideas and designs. From the first reproducible 1” condenser measurement microphone that enabled quality measurements and instrumentation for acoustic calibration, Mr. Rasmussen’s...

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