GRAS 40PH-10 CCP Free-field Array Microphone
Freq range: 10 Hz to 20 kHz
Dyn range: 33 dB(A) to 135 dB
Sensitivity: 50 mV/Pa
Technology
Typical applications and use
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Multi-channel measurements
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Sound-field analyses
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Sound-power measurements
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Concurrent spatial and transient measurements
Design
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 is that the microphones are phase-matched.
40PH-10 has a wide useful frequency range reaching up to 20 kHz and a large dynamic range topping at 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 GRAS 40PH-10 requires a constant current power supply, e.g. the GRAS 12AL CCP Supply, or any other CCP compatible power supply.
Close manufacturing tolerances together with the advantages of the TEDS chip, provide the 40PH-10
with a high degree of interchangeability; a major advantage when used in multiples forming arrays and matrices.
The low cost of the 40PH-10 is a key consideration when setting up measurements requiring a multiplicity of concurrent transient and spatial data.
Calibrating the 40PH-10 with a GRAS pistonphone, e.g. GRAS 42AA, is as straight forward as calibrating any other GRAS 1/4-inch microphone.
All GRAS microphones are individually checked and calibrated before leaving the factory. An individual calibration chart is supplied with each microphone.
Specifications
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Phase Match |
|
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50Hz - 100Hz |
±5˚ |
|
100Hz - 3kHz |
±3˚ |
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3kHz - 5kHz |
±5˚ |
|
5kHz - 10kHz |
±10˚ |
Frequency response according to IEC 61672-1
Typical frequency response
Upper curve shows free-field response at 0°, lower curve (dotted line) shows pressure response.
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Dimensions
Ordering info
Optional items
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3 m SMB - BNC Cable |
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1-Channel CCP Power Module with A-weighting filter |
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Array Module |
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GRAS AM0364 |
Windscreens (set of 6) |
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Rain-protection cap |
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Pistonphone, Class 1 |
|
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Multifunction Sound Calibrator, Class 1 |
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
