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  • How does it work?
    The Noise Compass uses a correlation technique to calculate the direction of the dominant noise source. A-weighting is applied, so the measured A-weighted LAeq level will be pointed to by the compass.
  • Can i see several sources with the Noise Compass?
    No. Only the dominant noise source will be presented. However, if source levels are comparable, the quality indicator will inform you. A quality level of 1 means that we have a very high SNR, while a lower quality level (say 0.5) indicates that multiple sources contributes to the direction. The output direction will then be the average of the sources.
  • How sure can I be that the direction is correct?
    The Noise Compass has a quality indicator that informs you about the uncertainty. A low quality level means that the measured sound direction has a diffuse field charactheristic, or that two sources is measured at about equal SPL. A high quality level indicates that the sources is uniqly defined with high SNR.
  • Can I use the Noise Compass inside?
    Yes, but be aware that the Noise Compass also picks up reflections. It will be hard to determine directions with high quality levels in a reflective environment.
  • What is the resolution?
    The angular resolution is not limited, but the uncertainty described in the specifications apply.
  • What are the sector limitations in NorCloud?
    Any sector can be defined as a combination of horizontal and vertical angle. The number of sectors is unlimited, and may also overlap.
  • What is a typical application of the Noise Compass?
    When combined with a Norsonic Nor145 or Nor150 and NorCloud, the Noise Compass will allow you to mark and separate parts of the measurement that comes from your defined directions. A typicall application is a construction site with a road or railway nearby. Define a sector covering the railway/road, and the measurement will be marked when the noise comes from that direction.
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