INTEGRAL ACTIVE NOISE CANCELLATION SECTION

摘要

Active noise cancellation apparatus comprising a plenum through which a sound travels, and a noise cancellation unit located within the plenum the noise cancellation unit comprising an apparatus for receiving the sound, an apparatus for receiving a cancelled sound signal, an apparatus for converting the received sound and the cancelled sound signal into an output signal, and an apparatus for emitting the output signal as an output acoustic signal to cancel the sound.