G.R.A.S. 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity
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G.R.A.S. 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity Date 10-06-2013. Page 1 of 5 G.R.A.S. 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity Sensitivity: 50 mV/Pa Freq resp: 3.15 Hz to 10 kHz Dynamic range: 16 dBA to 134 dB The 40AD is an IEC 61094 WS2P ½" prepolarized pressure microphone with rear-venting. It 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 146 dB and down to 17 dB(A) in the range of 3.15 Hz to 10 kHz. The presence of the 40AD in a sound field at low frequencies is minimal due to its small size compared to the large wavelengths. Introduction The 40AD is an IEC 61094 WS2P ½" prepolarized pressure microphone with rear-venting. Read about the externally polarized equivalent [40AG] 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 146 dB and down to 17 dB(A) in the range of 3.15 Hz to 10 kHz. The presence of the 40AD in a sound field at low frequencies is minimal due to its small size compared

G.R.A.S. 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity Date 10-06-2013. Page 2 of 5 to the large wavelengths. 40AD is individually factory-calibrated and delivered with a calibration chart stating its specific open-circuit sensitivity and pressure frequency response. Typical applications and use The 40AD is especially suited for audiometer calibration when using a sound level meter / analyzer without a 200 V polarization feature. It is the ideal partner for testing headsets, headphones, and earphones, as well as hearing aids, in coupler setups. The small size makes it well...

G.R.A.S. 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity Date 10-06-2013. Page 3 of 5 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, combined with the reinforced gold-plated microphone terminal which guarantees a highly reliable connection, enables G.R.A.S. to offer 5 years warranty against defective materials and workmanship. Learn more about G.R.A.S.'...

G.R.A.S. 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity Date 10-06-2013. Page 4 of 5 Dynamic range upper limit with G.R.A.S. CCP preamplifier 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, WEEE registered Weight

G.R.A.S. 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity 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....