The environmental noise analyzer is designed to make long-term outdoor noise monitoring simple and effective. It consists of three different sound level meters to go into the kit, a printer and optional DAT recorder. It is used for boundary noise measurements, statutory noise nuisance monitoring, nighttime noise levels and general consultancy work. It has two weatherproof connectors in the outside of the case that allow access to all the instrument connections, e.g. microphone, power in, signal out and DAT switching. A weatherproof microphone enclosure is also available along with a weatherproof cable to complete the kit. A security kit and movement alarm is also available so that the kit can be left with confidence.