G.R.A.S. 40PL CCP Free-field Array Microphone, High Pressure

Freq range: 10 Hz to 20 kHz
Dyn range: 32 dB(A) to 150 dB
Sensitivity: 10 mV/Pa
  • 40PL Free-Field Array Mic, High Pressure

Typical applications and use

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

Design

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 Type 40PL requires a constant-current power supply, e.g. theG.R.A.S. CCP Supply Type 12AL, or any other CCP compatible power supply.

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

The low cost of the Type 40PL is a key consideration when setting up measurements requiring a multiplicity of concurrent transient and spatial data.

Calibrating the Type 40PL with a G.R.A.S. pistonphone (Type 42AP is recommended) is as straightforward as calibrating any other G.R.A.S. ¼"microphone.

All G.R.A.S. microphones are individually checked and calibrated before leaving the factory. An individual calibration chart is supplied with each microphone.

Frequency range (±1 dB) Hz 100 to 5 k
Frequency range (±2 dB) Hz 10 to 20 k
Dynamic range lower limit (microphone thermal noise) dB(A) < 32
Dynamic range upper limit dB 150
Set sensitivity @ 250 Hz (±3 dB) mV/Pa 10
Power consumption mA 2 to 20
Microphone venting Front
Output impedance Ω < 50
Temperature range, operation °C / °F -10 to 50 / -50 to 122
Temperature range, storage °C / °F -40 to 85 / -40 to 185
Influence of axial vibration @1 m/s² dB re 20 µPa 50
TEDS UTID (IEEE 1451.4 ) 27 v. 1.0
Connector type SMB
CE/RoHS compliant/WEEE registered Yes / Yes / Yes
Weight g / oz 5.5 / 0.2

Frequency response according to IEC 61672-1

Typical frequency response

Optional accessories

G.R.A.S. AA0027 Extension cable SMB female to BNC
G.R.A.S. 12AL CCP supply
G.R.A.S. PR0002 Array Module
G.R.A.S. AM0364 Windscreens (set of 6)
G.R.A.S. RA0092 Rain-protection cap
G.R.A.S. 42AA Pistonphone