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