TYPE 4957

10 KHZ Array Microphone

Array Microphone for use in systems requiring a large number of microphones, for example, beamforming arrays, STSF measurements, and non-stationary STSF measurements.

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Array Microphone Type 4957 is a ¼" pre-polarized microphone suited for use in systems requiring a large number of microphones, such as beamforming arrays, STSF measurements, and non-stationary STSF measurements.

In combination, these microphones have specified and stable phase-matching over wide ranges of temperature and humidity.

USE SCENARIOS

  • Measurements using: Spatial Transformation of Sound Fields (STSF) Type 7688, Non-stationary STSF Type 7712, and Beamforming Type 7768
  • Hand-held array measurements
  • Simultaneous recording of time signals in medium to large microphone arrays, for example, simulated pass-by measurements
  • Cost-effective in-car measurements
The microphone preamplifier is of the industry-standard CCLD type allowing the use of only one cheap coaxial cable for signal, power supply, and TEDS.

A rugged protection grid provides an integrated heat shield. The microphone is front-vented for pressure equalization. 

The microphone is supplied in a hard box with one to six microphones delivered in a standard microphone box. Seven or more microphones are delivered in a multi-microphone mini-suitcase.
Capacitance
pF
Diameter
¼
Dynamic range
32 – 134 dB
Frequency range
50 – 10000 Hz
Inherent noise
32 dB A
Lower limiting frequency -3dB
Hz
Optimised
Array
Polarization
Prepolarized
Polarization voltages
0 V
Pressure coefficient
dB/kPa
Sensitivity
11.2 mV/Pa
TEDS UTID
127-0-0-0U
Temperature coefficient
db/ºC
Temperature range
-10 – 55 C
Venting
Front
Weight
3.8 gram
Sound field
Special
Input type
CCLD IEPE
Microphone type
Array