Outdoor Microphone Type 4184

The Weatherproof Microphone is an outdoor unit suitable for unattended measurements. Its omnidirectionality ensures that sounds from all directions are detected without any undesirable reflections from its casing affecting the noise measurements being undertaken.

The microphone is based on a unique patented probe tube system, where the microphone cartridge is installed inside the casing of the unit. The system automatically checks the calibration 4 times a day using an acoustical signal and the patented Charge Injection Calibration (CIC) check. CIC ensures that the entire measurement chain is tested.

It functions correctly under conditions of up to 96% relative humidity and in ambient temperatures ranging from - 40 to +50°C. Its precision condenser microphone is buried and fully protected within the unit's body. It has spikes at the top of its windscreen to deter birds.