½" Free-field microphone Type 40AC - Wide-frequency

The Type 40AC is a high precision microphone for laboratory work and as a working standard microphone in calibration laboratories. It covers a frequency range from 3.15 Hz to 40 kHz. Its small size and lower sensitivity make it extremely robust and stable. The Type 40AC is capable of measuring sound levels up to 160 dB re. 20µPa.