TYPE 4958

20 kHz precision array microphone

Designed for STSF measurements, non-stationary STSF measurements and beamforming arrays.

見積もり依頼

Type 4958 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 excellent amplitude and 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 TEDS (Transducer Electronic Data Sheet) contains information about the complex transfer function, hence enabling applications to calculate corrections for the individual transducer, resulting in more precise measurements. The microphone preamplifier is of the industry standard CCLD (constant current line drive) 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.

Type 4958 is a precision array microphone offering extended TEDS and excellent phase matching and amplitude linearity over a wider frequency range compared to Type 4957.

Capacitance
pF
Diameter
¼
Dynamic range
28 – 140 dB
Frequency range
10 – 20000 Hz
Inherent noise
28 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
127-0-0-1U
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