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

Claim 0:
1. A system, comprising:
at least a first noise monitoring station measuring noise levels amplitudes of a noise source at a first known location;
at least a second noise monitoring station measuring noise levels amplitudes at a second known location at a distance from the noise source at the first known location;
at least one meteorological station measuring wind speed and direction data in an area comprising the noise source at the first known location and the second known location; and
a controller receiving the noise levels amplitudes from the first and second noise monitoring stations and the wind speed and direction data from the meteorological station;
wherein said controller comprises a low pass-filter, said low pass-filter filtering transient short-duration events from the noise levels amplitudes measured at said first and second noise monitoring stations;
wherein, for long-duration events, said controller discriminates noise at the second known location originating from the noise source based on the measured noise levels amplitudes and the wind speed and direction data; wherein said controller comprises a comparator, said comparator comparing a measured sound transfer function between the first known location and the second known location with reference transfer functions, previously measured between the first known location and the second known location and stored over long-time periods in a range of meteorological conditions, said reference transfer functions being dependent on a wind component in a sound propagation axis, between the first known location and the second known location, and, when the difference between the measured transfer function and the reference transfer functions is above a predetermined threshold, said controller determines a probability that noise at the second known location originates from the noise emitted by the noise source at the first known location and discriminates, at the second known location, noise due to the noise source at the first known location from ambient noise in the second known location.