Microphone & PreAmplifier Combinations
Type 4957 10 KHZ Array Microphone
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