ETMC Technologies :: G.R.A.S. Sound & Vibration :: Type 40AD - a 1/2" 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 17 dBA re. 20µPa.

<H1>No Frames? No Problem!</H1> <p><br>Go to G.R.A.S. Sound & Vibration web site with <A HREF="http://www.gras.dk/00012/00013/00029/00117/">no-frames</A>.</p> <p>The Type 40AD is a 1/2" 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 17 dBA re. 20µPa. <p>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. <p>Specifications Type 40AD (WS2P/D) <p>Sensitivity: 50 mV/Pa <p>Dynamic range: 17 - 146 dB re. 20µPa <p>Frequency range: 6.3 Hz - 10 kHz <p>Polarisation voltage: 0 V <p>Outside diameter (with protection grid): 13.2 mm <p>Length: (with and 16.2 mm <p>without protection grid): 15.3 mm