Patent ID: 6072880
Filing Date: 2000-06-06
Classification: F01N,G10K

Abstract:
An active noise cancellation silencing system, comprising:a modular housing defining an acoustic enclosure, the modular housing including a body portion and a cover portion, the body portion having a first opening defined by a first mating flange, and the cover portion including a second opening defined by a second mating flange, wherein the first and second mating flanges are similarly dimensioned such that the body portion can receive the cover portion for sealing the acoustic enclosure;an acoustic outlet port formed in the body portion;a speaker disposed within the acoustic enclosure;an amplifier disposed within the cover portion and connected to the speaker;a microphone mounted to the housing; anda control unit disposed within the cover portion in communication with the microphone for receiving signals therefrom, the control unit determining an anti-noise signal for the amplifier for creating an amplified anti-noise signal responsive to a detected noise source.