The Weatherproof Microphone Unit Type 4184 is for use in permanent, semi-permanent or portable noise-monitoring systems. The unit can be used in most humid and corrosive atmospheres as the casing is made completely of stainless steel and it has a built-in protection system against humidity.
Type 4184 complies with standards IEC 651 Type 1 and ANSI S 1.4-1983 Type 1. The greatest attribute of Type 4184 is its excellent omni-directional characteristics. It is fully rotational about its vertical axis without any undesirable reflections from its casing affecting the noise measurements being undertaken. Type 4184 is based on a probe tube system that has allowed the microphone cartridge to be installed within the casing of the unit itself. This ensures that the microphone is afforded rain protection according to Standard IEC 529 IP44.
Each Type 4184 is individually calibrated and is delivered with a calibration chart giving the frequency responses.
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