A Single Sensor Active Noise Control Considering The Characteristics of The Speaker and The Microphone

스피커와 마이크의 전달특성을 고려한 단일 센서 능동소음제어

  • 김현태 (동의대학교 멀티미디어공학과) ;
  • 박장식 (동의대학교 영상정보과)
  • Published : 2003.12.01

Abstract

Active noise control(ANC) is an approach to noise reduction in which a secondary noise source destructively interferes with the unwanted noise is introduced. Generally, the performance of ANC is determined how well a secondary noise tracks noises. A secondary noise is generated from the cancelling speaker and a error sensor pick up error signal. The transfer function between the cancelling speaker and the error sensor is not flat and distorts secondary noises. Consequently, the performance of ANC is degraded by the transfer function. In this paper, a single sensor ANC which considers the characteristics of the speaker and the error sensor is proposed. To reduce distortion of secondary noises, the transfer function is estimated by adaptive inverse modelling and the primary noises are estimated by Kalman filter. Experimental results show that the proposed single sensor ANC effectively attenuates noises.