ON THE ACTIVE CONTROL OF TRANSIENT NOISE TRANSMISSION

A methodology to control transient noise transmission is presented. Th e applicability of H-2 optimal control in this setting is investigated and it is shown why this approach is particularly useful in the trans ient case. A design example is included that demonstrates how an activ e controller can be used to reduce the noise transmitted into a three- dimensional cavity through a flexible wall. It is concluded that this approach does in fact achieve the objectives of transient control with a stable, optimal controller incorporating a feedforward and a feedba ck component. (C) 1997 Elsevier Science Ltd.