ETMC Technologies :: G.R.A.S. Sound & Vibration :: Type 40PH and Type 40PL - are low-cost microphones for general-purpose measurements in arrays and matrices. They have a wide useful frequency range reaching up to and a large dynamic range topping at around 134 dB. They have an integrated CCP* preamplifier and built-in TEDS** enabling them to be programmed as a complete unit. Their main difference lies in the sensitivity: the Array Microphone Type 40PH has a sensitivity of 50 mV/Pa as opposed to the Type 40PL, which has a sensitivity of 10 mV/Pa.

<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/00012/00013/00016/">no-frames</A>.</p> <p>The Array Microphone Types 40PH and 40PL are low-cost microphones for general-purpose measurements in arrays and matrices. They have a wide useful frequency range reaching up to and a large dynamic range topping at around 134 dB. They have an integrated CCP* preamplifier and built-in TEDS** enabling them to be programmed as a complete unit. <p>Their main difference lies in the sensitivity: the Array Microphone Type 40PH has a sensitivity of 50 mV/Pa as opposed to the Type 40PL, which has a sensitivity of 10 mV/Pa. <p> * Constant Current.Power Supply <p>** Transducer Electronics Data Sheet - as proposed by IEEE-P1451.4