Overview of the application of active noise control technology in the indoor acoustic environment

Abstract

Passive noise reduction technology is not enough to improve the acoustic comfort of the indoor acoustic environment. This paper discusses the application prospects of active noise control technology in the indoor acoustic environment, studies the principle and development status of active noise control technology, describes the determinants of the effect about the active noise control and the application prospects in the indoor acoustic environment, and points out the current problems to be solved in the research and future research directions.

Maximum versoria criterion applied to hybrid active noise control algorithm for the impulsive noise

“…The principle of the ANC system is that the loudspeaker emits a secondary sound; the phase of this secondary sound is opposite to the primary noise, so as to achieve the purpose of noise reduction. 3 The ANC algorithm can be divided into two structures, one is the feedforward structure and the other is the feedback structure. In recent years, many scholars combined the feedforward structure with the feedback structure to form a hybrid system.…”