Environmental Sound Monitor

The NA-37 is capable of determining the sound source position based on sound arrival direction. 
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Compact dimensions make the unit suitable also for use in mobile monitoring systems. 
Measurement is fully automatic, and continuous 365-day all-weather operation is supported.

Easily Monitor Road Traffic Noise, Factory Noise, Construction Noise. 
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It complies with the manual of the Evaluation of 〝Environmental Quality Standards for Noise.

Features

  • Long-term data storage to internal memory
  • Data transfer via LAN
  • Support for data copy to USB flash drives
  • Support for using GPS (option) for automatic time correction and acquisition of position information useful for mobile use.
  • Real sound recording program NX-37WR (factory option) allows sound recording in two format types:
  • Compressed (for long-term recording)
                          - PCM (for analysis)
                          - Color LCD screen provides good outdoor visibility
  • Battery backup power supply ensures continued operation also during a power failure 

Related Products

​Sound Level Meter NA-83 

The NA-83 conforms to the requirements of IEC 61672-1:2002 Class 1 (The conditions of the microphone attached the window screen and 30 m connected them with the specialized cable.)
​CE mark, EMC directive compliant (reduction of influence on an external electromagnetic noise) 

Outdoor Microphone System

Outdoor Microphone MS-11
MS-11 has a built-in heater and a built-in sound source for automatic calibration, and is suitable for long-term outdoor use
All-Weather Windscreen WS-13 
WS-13 has bird spikes to keep birds away.​
Sound Discrimination Unit AN-37
The AN-37 allows discrimination between factory noise and peripheral noise from outside the site, and displays sound source direction. This is used in case of measurement of only the target factory noise.

​Environmental noise measurement system (example) 

Great for environmental noise measurements along highways 

​Facility with noise and atmospheric measurement equipment, located next to a highway
  1. Anemometer measuring wind speed and wind direction
  2. Highway
  3. Air intake for atmospheric measurements
  4. Cubicle for housing noise and atmospheric measurement equipment
  5. Outdoor microphone
​Microphone installation example

For Aircraft Noise Measurement

Designed for Long-term Aircraft Noise Monitoring Application. Provides Functionality, Durability and Easy Maintenance Required for Automated System.

​The system has a feature for reliable identification of aircraft noise, while its compact dimensions make it suitable also for mobile use. Measurement is fully automatic, and continuous 365-day all-weather operation is supported

For Aircraft Noise and Ground Noise Measurement

Measurement of aircraft and ground noise in the vicinity of airports.

Visualization of how noise sources are identified

​Use up to five window areas to distinguish aircraft noise and ground noise from other noise (noise to be excluded).

Single noise event: This is a temporary noise which occurs sporadically, such as noise caused by air travel that can be observed within the vicinity of the airport. Above-ground noise produced by aircraft is also a form of single noise.

Long term noise event: This noise is steadily produced over a long period of time, but the noise level fluctuates greatly. Common examples are engine testing noise and the noise originating from the auxiliary power unit (APU).

Data Sheet & Product Information