Type 40AD

The Type 40AD
is a ½" general purpose microphone, covering a frequency range from 6.3 Hz to 10 kHz. Because of its high sensitivity, it can measure sound pressure levels down to 16 dBA re. 20µPa.
This microphone is is similar to the Type 40AP but, as a prepolarised condenser microphone, it does not require an external polarisation voltage and can be used with G.R.A.S. CCP* preamplifiers such as the Type 26CA.
Specifications Type 40AD (WS2P/D)
Specifications Type 40AD (WS2P/D)
50 mV/Pa
Dynamic range:
16 dBA - 148 dB re. 20µPa
Frequency range:
6.3 Hz - 10 kHz
Polarisation voltage:
0 V
Outside diameter (with protection grid):
13.2 mm
Length: (with and
16.2 mm
without protection grid):
15.3 mm
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