Patent ID: 11959798
Assignee: SYSTÈMES DE CONTRÔLE ACTIF SOFT DB INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A method, comprising:
measuring noise levels amplitudes of a noise source located at a first known location at at least a first noise monitoring station;
measuring noise levels amplitudes at a known second location at a distance from the noise source at at least a second noise monitoring station;
measuring wind speed and direction in an area comprising the noise source at the first known location and the known second location;
filtering transient short-duration events from the noise levels amplitudes measured at the first monitoring station, yielding filtered noise levels amplitudes of the noise source;
filtering transient short-duration events from the noise levels amplitudes measured at the known second location, yielding filtered noise levels amplitudes of the known second location; and
for long-duration events, measuring a sound transfer function between the first known location and the known second location and comparing the measured sound transfer function between the first known location and the known second location with reference transfer functions previously measured between the first known location and the known second location and stored over long-time periods in a range of meteorological conditions, the reference transfer functions being dependent on a wind component in a sound propagation axis;
comparing the measured sound transfer function with a reference transfer function; and
when the difference between the measured transfer function and the reference transfer functions is above a predetermined threshold, determining a probability that noise at the known second location originates from the noise emitted by the noise source at the first known location;
thereby discriminating, at the second known location, noise due to the noise source at the first known location from ambient noise in the second known location.