G.R.A.S. 40AG 1/2" Ext. Polarized Pressure Microphone, High Frequency Date 10-06-2013. Page 1 of 5 G.R.A.S. 40AG 1/2" Ext. Polarized Pressure Microphone, High Frequency Sensitivity: 12.5 mV/Pa Freq resp: 3.15 Hz to 20 kHz Dynamic range: 20 dBA to 154 dB The 40AG is an IEC 61094 WS2P ½" externally polarized pressure microphone with rear-venting. It is a high-precision Type 1 condenser microphone made according to IEC 61094-4 requirements and is ideal for coupler measurements in both laboratory and production environments. It is extremely robust and reliable and can measure sound pressure levels up to 160 dB within 3.15 Hz to 20 kHz. Introduction The 40AG is an IEC 61094 WS2P ½" externally polarized pressure microphone with rear-venting. Read about the prepolarized equivalent [40AO] It is a high-precision Type 1 condenser microphone made according to IEC 61094-4 requirements and is ideal for coupler measurements in both laboratory and production environments. It is extremely robust and reliable and can measure sound pressure levels up to 160 dB within 3.15 Hz to 20 kHz. 40AG is individually factory-calibrated and delivered with a calibration chart stating its specific open-circuit sensitivity and pressure frequency response.

G.R.A.S. 40AG 1/2" Ext. Polarized Pressure Microphone, High Frequency Date 10-06-2013. Page 2 of 5 Typical applications and use The broad working range and reliability has made 40AG the preferred externally polarized microphone for coupler and ear simulator setups and is the natural supplement to or replacement of existing solutions. The 40AG is especially suited for audiometer calibration when using a sound level meter / analyzer with a 200 V polarization feature. It is used for production line testing in coupler setups for test of hearing aids, earphones, headphones, and headsets. The KEMAR...

G.R.A.S. 40AG 1/2" Ext. Polarized Pressure Microphone, High Frequency Date 10-06-2013. Page 3 of 5 Quality and warranty All G.R.A.S. microphones are made of high-quality materials that will ensure life-long stability and robustness. The microphones are all assembled in verified clean-room environments by skilled and dedicated operators with many years of expertise in this field. The microphone diaphragm, body, and improved protection grid are made of high-grade stainless steel, which makes the microphone resistant to physical damage, as well as corrosion caused by aggressive air or gasses. This,...

G.R.A.S. 40AG 1/2" Ext. Polarized Pressure Microphone, High Frequency Date 10-06-2013. Page 4 of 5 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 with G.R.A.S. preamplifier @ ±60 V / +120 V power supply Microphone cartridge capacity, typical Microphone cartridge venting Temperature range, operation Temperature range, storage [dB/°C / dB/°F] Static pressure coefficient @250 Hz Humidity range non condensing Influence of axial vibration @1 m/s² CE/RoHS compliant,...

G.R.A.S. 40AG 1/2" Ext. Polarized Pressure Microphone, High Frequency 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...