Weatherproof Microphone unit with exceptional omnidirectional characteristics. This microphone is built to withstand changing weather-conditions, and provides an ideal solution for permanent or semi-permanent outdoor noise monitoring.Request Price
This microphone is designed for use in humid and corrosive atmospheres. Casing is made completely of stainless steel and it has a built-in protection system against humidity - and complies fully with standards IEC 651 Type 1 and ANSI S 1.4-1983 Type 1.
- Permanent noise-monitoring systems
- Semi-permanent noise-monitoring systems
- Portable noise-monitoring systems
- Noise measurements in most humid and corrosive atmospheres
The middle section contains the microphone, the preamplifier, the impedance matching tubes, the circuit board comprising a filter and cable driver, the built-in test sound source and its transmission tube.
The impedance matching tube system comprises four tubes of specific lengths. The test sound source consists of two miniature loudspeakers and the transmission tube which feeds the signal to a point below the mouth of the probe tube.
The probe tube system allows the microphone cartridge to be installed within the casing of the unit itself. This ensures that the microphone is afforded rain protection according to the IEC 529 IP44 standard
Type 4184 is individually calibrated and is delivered with a calibration chart giving the frequency responses.
- Probe (0.3")
- Dyn. range
- 27 – 140 dB
- Freq. range
- 20 – 20000 Hz
- Inherent noise
- 27 dB A
- Lower limiting frequency -3dB
- 4 Hz
- Ext polarized
- Polarization voltages
- 200 V
- Pressure coefficient
- -0.006 dB/kPa
- 12.5 mV/Pa
- Temperature coefficient
- -0.005 db/ºC
- Temperature range
- -10 – 50 C
- Sound field
- Input type
- Microphone type