TYPE 4182

Probe microphone, 1 Hz to 20 kHz, 200 V polarization

Designed for near-field measurements in small or awkward places or in harsh environments where a conventional microphone would be unsuitable.

Angebot anfordern

Type 4182 is designed for sound pressure measurements to be made in small or awkward places or in harsh environments where a conventional microphone would be unsuitable. The probe microphone has a smooth frequency response from 1Hz to 20kHz, with a very smooth high-frequency roll-off.

USE SCENARIOS

  • Near-field measurement of loudspeakers
  • Investigation of sound distribution inside:
  • Telephone equipment
  • Hi-Fi headphones
  • Musical instruments
  • Measurement of noise radiation from intricate machinery
  • Measurement of attenuation in hearing protectors
  • Acoustic impedance measurements
Physically, it is very small and lightweight and has a durable construction. Measurements can be performed extremely close to the sound source due to its small size. Measurement points can be closely spaced when it is necessary to have high spatial resolution.

The high impedance of the narrow probe tip enables measurements in very small volumes – as small as 1cm3 with only minor effects due to acoustic loading. Interchangeable stiff and flexible probe tubes, of various lengths, make the probe microphone very adaptable for measurements in awkward places (for safety reasons Probe Microphone Type 4182 is not suitable for measurements on the human body).

The static pressure inside the probe microphone can be equalised to that of the measurement site.
Capacitance
pF
Diameter
Probe (0.05")
Dynamic range
42 – 164 dB
Frequency range
1 – 20000 Hz
Inherent noise
42 dB A
Lower limiting frequency -3dB
Hz
Optimised
Probe
Polarization
Ext polarized
Polarization voltages
200 V
Pressure coefficient
-0.007 dB/kPa
Sensitivity
3.16 mV/Pa
Temperature coefficient
-0.005 db/ºC
Temperature range
-10 – 700 C
Venting
Selected
Weight
gram
Sound field
Special
Input type
Classic
Microphone type
Probe