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Noise Compass - Noise Monitoring with Direction
Norsonic was the first company to introduce sound recording of noise events in a sound level meter. This greatly improved the work to identify a noise event and to judge whether it should be excluded or not from the overall noise level. However, it’s quite time consuming to listen through numerous sound recordings. The three-dimensional Nor1297 Noise Compass significantly reduces time spent on judging if a noise source should be a part of the overall noise calculation or not, simply by defining which direction the noise is coming from. When used together with Norsonic’s sound level meters and NorCloud, the device provides a three-dimensional vector pointing at the sound source. The system may also operate off-line and collect the data on the instruments SD card for later analyse in NorReview.
Measure sound pressure as usual
Use Norsonic sound level meter or noise monitoring station to monitor the sound pressure level of a site.
Add dominant source detection
Add the Noise Compass to your setup and measure the direction of the dominant noise source, in all three dimensions.
Avoid listening - save time!
The Noise Compass allows you to mark and filter out sources outside a region of interest. The nearby railway or passing airplanes can be detected automatically, no need to listen to verify.
Calculate sound levels for the site
Sound incident from directions not inside your definition of a site can be automatically marked and excluded from the measurement. The result is Leq or Lden values based on your site definition only.
Single Ethernet cable
The unit receives power and sends data to Nor145 and Nor150 via a single ethernet cable.
8 MEMS microphones
An array of 8 MEMS microphones ensures full 3D sound incident detection.
Norsonic compatible mounting
Fits all existing outdoor microphones. The Noise Compass simply adds inn below the mic assembly.
IP55 rated
The unit is fully weather protected for harsh outdoor monitoring.
A-weighted
The noise is preprocessed with A-filters.
100 MS Profile
The Noise Compass delivers data ten times a second.
Smooth in Time
Directional data is exponentially smoothed in time to provide high precision indication.
Impulsive When Necessary
The Noise Compass also handles impulsive sounds down to 10 ms duration.
Quality ensured
The Noise Compass provides a quality indicator to avoid false detection.