G.R.A.S. 40EN 1" Ext. Polarized Pressure Microphone Date 10-06-2013. Page 1 of 5 G.R.A.S. 40EN 1" Ext. Polarized Pressure Microphone Sensitivity: 50 mV/Pa Freq resp: 2.6 Hz to 8 kHz Dynamic range: 9.6 dBA to 146 dB The 40EN is an IEC 61094 WS1F 1" externally polarized pressure microphone. 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 40EN is an IEC 61094 WS1F 1" externally polarized pressure microphone. 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. The 40EN can be vented in three different ways to suit your application requirements. 40EN is individually factory-calibrated and delivered with a calibration chart stating its specific open-circuit sensitivity and pressure frequency response.

G.R.A.S. 40EN 1" Ext. Polarized Pressure Microphone Date 10-06-2013. Page 2 of 5 Typical applications and use The 40EN has a flexible design for venting. It is delivered as front-vented from the factory due to a special O-ring included in the microphone assembly. Using a special G.R.A.S. tool, you can replace this O-ring with a different O-ring (included) that makes the microphone rear-vented. Using both O–rings makes the microphone non-vented. 40EN is included in 43AF 1" 6cc Coupler Kit according to IEC 60318-3 RA0075 1" 6cc Coupler Kit according to IEC 60318-3 RA0113 1" 2cc Coupler according...

G.R.A.S. 40EN 1" Ext. Polarized Pressure Microphone Date 10-06-2013. Page 3 of 5 pleases your quality assurance department because you don't have to worry about new serial numbers, etc. Learn more about G.R.A.S.' service program. Calibration Before leaving the factory, all G.R.A.S. microphones are calibrated in a controlled laboratory environment 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...

G.R.A.S. 40EN 1" Ext. Polarized Pressure Microphone Date 10-06-2013. Page 4 of 5 dB/°F] Static pressure coefficient @250 Hz Humidity range non condensing Influence of axial vibration @1 m/s² CE/RoHS compliant, WEEE registered Weight

G.R.A.S. 40EN 1" Ext. Polarized 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 ingenuity...