0 - 50 dB microphone 40AP-FV

50 - 100 dB100 - 150 dB20+ mV/Pa

The 40AP-FV is an IEC 61094 WS2P ½" externally polarized pressure microphone with front venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements and is ideal for coupler and boundary measurements in both laboratory and production environments. It is extremely robust and reliable and can measure sound pressure levels up to 149 dB within 3.15 Hz to 10 kHz. Because of its high sensitivity, it can also measure sound pressure levels down to 16 dB(A). If needed, the 40AP can also be used as a random-incidence microphone. 40AP-FV 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 40AP-FV 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. Compatibility The 40AP-FV requires a standardized ½" or ¼" LEMO preamplifier and an input module that supports this technology with a 7-pin LEMO connector. System verification For daily verification and check of your measurement setup, we recommend using a calibrator like GRAS Sound Level Calibrator 42AG Quality and warranty All GRAS 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.