Noise Monitoring Terminal Type 3597

The Noise Monitoring Terminal (NMT) is for outdoor use, in all climatic environments, and is a component of an unattended environmental noise monitoring terminal system.

The NMT is an intelligent unit built around Brüel & Kjær's Noise Level Analyzer Type 4441 and Weatherproof Microphone Unit Type 4184 With a modem, the NMT can communicate with a remote PC using public telephone lines, wireless LAN, cellular phones, ISDN or LAN. The Noise Level Analyzer and the modem are housed in a protective weatherproof cabinet fitted with a thermostatically controlled fan and heater.

The NMT does the following:
· Makes remote unmanned environmental noise measurements
· Correctly gauges the signal from the weatherproof microphone unit
· Provides the necessary frequency and time weightings
· Processes noise data
· Checks the calibration of the weatherproof microphone unit
· Stores the results of several months of monitoring
· Transmits data via RS - 232 or LAN interface