ETMC Technologies :: G.R.A.S. Sound & Vibration :: Type 40AU - a laboratory-standard microphone which can be used, for example, in couplers, ear simulators, enclosures and at boundaries. It is an externally polarised pressure microphone with a large dynamic range and an extended frequency response. This microphone is capable of measuring sound pressure levels up to 160 dB 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/00012/00013/00029/00212/">no-frames</A>.</p> <p>The Type 40AU is a laboratory-standard microphone which can be used, for example, in couplers, ear simulators, enclosures and at boundaries. It is an externally polarised pressure microphone with a large dynamic range and an extended frequency response. <p>This microphone is capable of measuring sound pressure levels up to 160 dB re. 20µPa. <p>Specifications Type 40AU (LS2aP) <p>Sensitivity: 12.5 mV/Pa <p>Dynamic range: 27 - 160 dB re. 20µPa <p>Frequency range: 3.15 Hz - 20 kHz <p>Polarisation voltage: 200 V <p>Outside diameter (front: 13.2 mm <p>and back): 12.7 mm <p>Length: (with and 12.5 mm <p>without protection grid): 11.6 mm