Outdoor microphones

Experience the Norsonic NOR1297 Outdoor Microphones — engineered for precise, standards-compliant acoustic measurements. Applications Construction site monitoring Harbour monitoring Airport monitoring Road/railway monitoring Plant monitoring About 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.   Why should I get the Noise compass? 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. 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. Noise Compass and NorCloud NorCloud is a Norsonic system to collect, display and process sound level data. When used together with a Norsonic Sound Level Meter, you can, measure, analyse and report directly from your web browser. Create projects, assign sound level meters to projects and configure settings such as audio recording, SMS/e-mail alarms and automatic reporting. NorCloud stores your data safely and conveniently, but you are of course free to download your measurements. Browse measurements Show your measurements as a function of time, and see the instantaneous direction. Analyse Check the noise distribution over a timespan in surface and scatter plots. Define sectors Create your own sectors to automatically generate markers on your measurements. Report Let NorCloud automatically generate reports in the interval you specify.   Define sectors with horizontal and vertical plane boundaries and quality threshold. Any number of sectors are allowed, the resolution is 1 degree.   Hover over the time series plot to see time instant direction. When the sound incidence matches your sector, the sector is highlighted.   Look at the LAeq noise in both scatter and surface plot. The plots are generated for the timespan selected in the time series plot. Noise Compass and NorReview NorReview is a Norsonic desktop application for advanced analysis. Import measurements to do analysis according to several international and national standards. You can use the software to edit and annotate your measurements, calculate new functions. NorReview supports advanced report generation and customization of reports using Microsoft Excel. NorReview is widely acknowledged for its high flexibility and advanced functionality. Review Show your measurements as a function of time, and see the instantaneous direction. Mark Automatic marker generation for sectors defined in NorCloud. Calculate Generate new values for your measurements with markers included or excluded. Report Generate reports for your recalculated measurements.   Use automatic marker calculation from NorCloud sector defines.   Calculate global values for the markers regions or the measurement without the marker regions.   NorReview results. Aircraft noise excluded in this measurement   Use automatic marker calculation from NorCloud sector defines. 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   Nor1297 calibration results – Typical performance and measurement uncertainty