Active exhaust silencer

Details Active exhaust silencer Active exhaust silencer

1994-09-06

1996-07-30

Dang, Khanh

Acoustics

Sound-modifying means

By wave interference

381 71, F01N 106

Patent

active

055413730

ABSTRACT:
An active silencer for a vehicle exhaust system that has a low profile so that it can be hung underneath the vehicle in a conventional manner without altering the vehicle. The silencer has a chamber isolated from the exhaust flow in which one or more speakers are mounted side-by-side. The speakers face downwards and share a common tuning chamber within the isolated chamber. The tuning chamber is ported to a mixing chamber where the canceling acoustic waves mix with noise from the exhaust flow before the exhaust noise exits to the atmosphere.

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