Nor1297 Noise Compass

Nor1297 Noise compass

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 dominant 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.

Features

• The noise is preprocessed with A-filters.
• The Noise Compass delivers data ten times a second.
• Directional data is exponentially smoothed in time to provide high precision indication
• The Noise Compass also handles impulsive sounds down to 10 ms duration.
• The Noise Compass provides a quality indicator to avoid false detection.
• An array of 8 MEMS microphones ensures full 3D sound incident detection.
• The unit receives power and sends data to Nor145 and Nor150 via a single ethernet cable.
• The unit is fully weather protected for harsh outdoor monitoring.
• Fits all existing outdoor microphones. The Noise Compass simply adds inn below the mic assembly.

Specifications

• Horizontal angle range: 0 to 360 degrees
• Vertical angle range: – 90 to 90 degrees
• Sound pressure level range: 40 to 123 dB SPL re. 20 µPa
• Operating conditions: Free-field
• Horizontal accuracy: ± 7.5 deg. , std. dev. typ. 2.0 deg.
• Vertical accuracy: ± 10 deg. , std. dev. typ. 4.0 deg.
• Calibration: Factory calibrated with certificate
• Operation principle: Multi-correlation
• Time resolution: 100 ms
• Filtering: A-weighting
• Time averaging: Exponential time and 10 ms max
• Instrument compatibility: Nor145 and Nor150
• Software compatibility: NorCloud and NorReview
• Mounting: Nor1216 and Nor1217 compatible
• Ingress protection: IP55
• Connectivity: Ethernet 100 mbps
• Power supply: 5V to 15 V passive power-over-ethernet