40PH CCP Free-field Array Microphone
from GRAS

Microphones and Accelerometers

Typical applications and use

  • Multi-channel measurements
  • Sound-field analyses
  • Sound-power measurements
  • Concurrent spatial and transient measurements


Array microphones are designed to be mounted on large or small arrays. Such systems are typically used for measuring and locating noise sources, and here the phase match is important to get good accuracy in the measurements. An important characteristic of array microphones are precisely that the microphones are phase-matched.

40PH has a wide useful frequency range reaching up to 20 kHz and a large dynamic range topping at around 135 dB,  the peak value before visible clipping.

It has an integrated CCP preamplifier and is delivered with a built-in TEDS chip which enables it to be programmed as a complete unit. The G.R.A.S. 40PH requires a constant current power supply, e.g. the G.R.A.S. 12AL CCP Supply, or any other CCP compatible power supply.

Close manufacturing tolerances together with the advantages of the TEDS chip, provide the 40PH with a high degree of interchangeability; a major advantage when used in multiples forming arrays and matrices.


Terms & Conditions

Download a copy of the AcSoft Equipment Rental Terms and Conditions here.

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