Type 3639

Permanent noise monitoring

Permanent noise monitoring terminals to continuously manage sound levels.

Request a quote

This noise monitoring terminal range provides unattended, environmental sound level monitoring to demonstrate compliance with regulations, avoid breaching noise restrictions, limit noise impact and improve noise maps.

The permanent units accurately and reliably measure, record, process, store and transmit noise data while you’re off site. The terminals are specifically designed for 24/7 independent outdoor monitoring. They work as part of a complete system controlled from a PC.


  • High up time to assess real-time noise levels 24/7
  • Remote operation
  • Data post processing
  • Protection of system components against weather and vandals
  • Best in breed accuracy (independently type approved Class 1 instrumentation with automated system integrity checks)

The noise monitoring terminals provide data you can trust, enabling you to make real-time decisions to avoid exceeding noise restrictions and prove compliance with limits. Reduce total monitoring cost and demands on your time with terminals that include:

  • A wide range of solutions for all applications, needs and budgets
  • Type approved to IEC 61672 Class 1 specifications, including windscreen effects
  • 120 dB dynamic range
  • Self-monitoring capabilities (watchdog) for increased uptime
  • Built-in facilities to minimize gaps in data
  • Charge Injection Calibration (CIC) or a built-in actuator for remote verification of the entire measurement chain
  • LAN, WLAN, 3G, 4G and CDMA communication capabilities for remote operation
  • Industry-standard Internet and security protocols for safe and reliable live data streaming
  • Wide range of integrated peripherals for communications, powering, mounting, weather and other parameters