ACTIVE NOISE CONTROL DEVICE

摘要

A device including an acoustic wave generator (10) and means (2 or 2', 4, 11) for controlling the generator (10) to transmit acoustic waves in phase opposition to the acoustic waves of the noise. Said generator (10) is an acoustic amplifier in which a pressurised fluid flow interacts with a movable obstacle (15) controlled by said means (2 or 2', 4, 11). Said generator (10) is advantageously a pneumatic loudspeaker. The device is useful for controlling noise in a harsh and/or polluting environment.