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

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Catalogue excerpts

G.R.A.S. 40EU 1" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 1 of 5 G.R.A.S. 40EU 1" Ext. Polarized Reference Pressure Microphone Sensitivity: 50 mV/Pa Freq resp: 2.6 Hz to 8 kHz Dynamic range: 9.6 dBA to 146 dB The 40EU is an IEC 61094 LS1P 1” externally polarized pressure microphone that is rear-vented. It is a 1” pressure microphone that is ideal for measurements in couplers used for testing earphones. When flush-mounted, it can measure sound pressures at boundaries. It is highly suited as a laboratory-standard microphone. Introduction The 40EU is an IEC 61094 LS1P 1" externally polarized pressure microphone that is rear-vented. It is a 1" pressure microphone that is ideal for measurements in couplers used for testing earphones. When flush-mounted, it can measure sound pressures at boundaries. It is highly suited as a laboratory-standard microphone. 40EU 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. 40EU 1" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 2 of 5 40EU can be used in precision reciprocity calibrations because it is a linear reversible transducer. This means that the electrical energy emitted by the 40EU is strictly or linearly proportional to the acoustical energy it receives. This is exactly what is required for such calibrations. When carefully handled, the 40EU can retain its calibrated properties for many centuries. The 40EU is also highly suited as a laboratory reference for secondary calibration of working-standard microphones. Compatibility...

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G.R.A.S. 40EU 1" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 3 of 5 using traceable calibration equipment. 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...

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G.R.A.S. 40EU 1" Ext. Polarized Reference Pressure Microphone Date 10-06-2013. Page 4 of 5 Humidity coefficient @250 Hz Influence of axial vibration @1 m/s² CE/RoHS compliant, WEEE registered Weight

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G.R.A.S. 40EU 1" 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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