Products

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