TYPE 4957

10 kHz array microphone

Designed 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" prepolarized microphone suited for use in systems requiring a large number of microphones, for example, beamforming arrays, STSF measurements, and non-stationary STSF measurements. 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– 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.
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