1/4-inch Free-field Microphone, Prepolarized 

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 humidity phase 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.