Active Noise, Isolation of an Acoustic Power Mode

Abstract

This paper describes a study of active noise isolation of an acoustic power mode. Generally, the simple suppression of the structure vibration does hot necessarily result in good reduction of radiated noise, but acoustic power mode is an effective factor which connects the vibration and the radiated sound. By calculating power transfer matrix, the influence which each mode has on acoustic power is found and by using PZT as mode sensor, it will be possible to control the acoustic power modes with adaptive algorithm such as LMS.