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.
Construction site monitoring
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
Nor1297 calibration results – Typical performance and measurement uncertainty