TYPE 4954
1/4-inch Free-field Microphone, Prepolarized
Free-field microphone designed for high-level and high-frequency measurements over a frequency range of 4 Hz to 100 kHz.
Request PriceType 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.
- Capacitance
- 5.1 pF
- Diameter
- 1/4
- Dyn. range
- 35 – 165 dB
- Freq. 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 ℃
- Venting
- Side
- Weight
- gram
- Sound field
- Free-field
- Microphone type
- Free field