Improvements to the processes and devices for protecting a...

Details Improvements to the processes and devices for protecting a... Improvements to the processes and devices for protecting a...

G - Physics

10

K

G10K 11/16 (2006.01) G10K 11/178 (2006.01) G10K 11/34 (2006.01)

Patent

CA 2110763

Improvements to the processes and devices for protecting a given volume, preferably arranged inside a room, from outside noises. ABSTRACT To protect a volume (2) arranged inside a room (3) in regard to outside noises E, use is made of an array of acoustic sensors (11j) receiving the noise E and arranged a distance A from the volume and of an array of acoustic sources (15k) arranged a distance B less than A from the volume and signals S are applied to these sources, these signals being summations of the double convolution products of the function Ej(t) with two functions fij(t) and gik(-t) which are directly deducible from the impulse respsonses gathered, on the one hand, at the sensors (11j) from pulses emitted by the sources (10i) carried by a ficititious barrier (6) dilimiting the volume and, on the other hand, at sensors (12i) stationed at the same places as these latter sources (10i), from pulses emitted by the above sources (15k). FIGURE 1

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