Auto-adjusting sound masking system and method
First Claim
1. A sound masking system for emitting a target masking noise in a room, comprising a mask filter that is automatically determined by measuring an acoustical response of the room and an ambient noise in the room, the acoustical response of the room being obtained during emission of an unfiltered white noise in the room and the ambient noise in the room being obtained in the absence of the emission of the unfiltered white noise in the room, and subtracting the ambient noise from an ideal masking noise and correcting by the acoustical response of the room, said mask filter, once determined, filtrating a white noise to yield the target masking noise to be emitted in the room.
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Abstract
A system and method for generating a masking noise level and spectrum automatically adjusted to obtain a target masking noise spectrum in a room. The system comprises a white noise generator and a mask filter automatically determined according to a correction of an acoustical response of the room and to the target masking noise corrected by an ambient noise.
43 Citations
15 Claims
- 1. A sound masking system for emitting a target masking noise in a room, comprising a mask filter that is automatically determined by measuring an acoustical response of the room and an ambient noise in the room, the acoustical response of the room being obtained during emission of an unfiltered white noise in the room and the ambient noise in the room being obtained in the absence of the emission of the unfiltered white noise in the room, and subtracting the ambient noise from an ideal masking noise and correcting by the acoustical response of the room, said mask filter, once determined, filtrating a white noise to yield the target masking noise to be emitted in the room.
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7. A method for generating a target masking noise in a room, comprising:
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obtaining an acoustical response of the room during emission of an unfiltered white noise in the room; obtaining an ambient noise in the room in the absence of the emission of the unfiltered white noise in the room; determining a noise correction filter by subtracting the ambient noise from an ideal masking noise and correcting the result by the acoustical response of the room; - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification