4954  ¼-inch Prepolarized Free-field Microphone 3.16 mV/Pa

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.

Carefully selected materials and advanced production techniques such as artificial aging and clean room assembly guarantee excellent long-term stability and low noise even in harsh environments.

The microphone has excellent amplitude and phase matching over wide ranges of temperature and humidity.

The microphone does not need an external polarization voltage, thus enabling the use of inexpensive 2-wire system (DeltaTron®) input.

The microphone is side vented for pressure equalization.

Each microphone is individually calibrated and comes with a calibration chart and a mini CD with calibration data and information about the influence of different measurement conditions and accessories.