video corpo

measurement microphone / prepolarized / free-field / pressure
4954 Bruel and Kjaer



  • Applications:


  • Technology:


  • Other characteristics:

    free-field, pressure, 1/4"


Designed for high-level and high-frequency measurements.
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.


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


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.

Other Bruel and Kjaer products

Acoustic Transducers