TYPE 4954

¼-inch free-field microphone, 4 Hz to100 kHz, prepolarized

Designed for high-level and high-frequency measurements.

Demande de devis

Type 4954 is a 1/4-inch Prepolarized Free-field microphone and is specially designed for high-level and high-frequency measurements.

The use of a laser welded stainless steel diaphragm and a stainless steel protection grid, make this microphone capable of withstanding rough environments.

USE SCENARIOS

  • High-frequency measurements
  • High-level measurements
  • Cost-effective measurements

CAPABILITIES

  • Excellent amplitude and phase matching over wide ranges of temperature and humidityphase response
  • Excellent long-term stability through artificial aging and clean room assembly guarantee excellent long-term stability and low noise even in harsh environments
  • Side vented for pressure equalization.
  • The microphone does not need an external polarization voltage, thus enabling the use of inexpensive 2-wire system (CCLD) input.

Prepolarized Free-field Microphone Type 4954 has been optimised for a flat, free-field response and is suited for measurements far beyond the audible range. Due to its wide frequency range, the frequency response in the audible range is typically within ±1 dB.

 

Capacitance
5.1 pF
Diameter
1/4
Dynamic range
35 – 165 dB
Frequency range
4 – 100000 Hz
Inherent noise
35 dB A
Lower limiting frequency -3dB
3 Hz
Optimised
Free field
Polarization
Prepolarized
Polarization voltages
V
Pressure coefficient
-0.007 dB/kPa
Sensitivity
3.16 mV/Pa
Standards
IEC 61094-4 WS3F
Temperature coefficient
0.009 db/ºC
Temperature range
-40 – 150 C
Venting
Side
Weight
gram
Sound field
Free-field
Microphone type
Free field