Locally global active noise control based on wavefront synthesis

Xun Wang, Yosuke Koba, Satoshi Ishikawa, Shinya Kijimoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents an active noise control (ANC) approach to reducing noise in a certain area by controlling the sound pressure at a local point based on the concept of wavefront synthesis. Multi-input and multi-output (MIMO) ANC systems can achieve the global control of noise. However, the computational complexity of the control algorithm and the complicated hardware configuration limit the use of MIMO systems. In order to simplify the system structure, a concept of dividing a global ANC system into sub-systems according to the control objectives is considered in this paper. One sub-system is to reproduce the wavefront of the incident noise into the target area, and the other one is to tune the amplitude and phase of the reproduced control sound wavefront. The first system objective can be realized by a sound field reproduction method, and the latter one can be implemented by a single-input and single-output (SISO) ANC system. Based on this concept, a locally global ANC system using a loudspeaker array that reproduces planar waves according to the incident angle of the noise is proposed. Numerical simulations are conducted to verify the effectiveness of the system. The results show that the proposed system can effectively reduce the noise in the target area regardless of the incident angle of the noise.

Original languageEnglish
Title of host publicationICSV 2016 - 23rd International Congress on Sound and Vibration
Subtitle of host publicationFrom Ancient to Modern Acoustics
PublisherInternational Institute of Acoustics and Vibrations
ISBN (Electronic)9789609922623
Publication statusPublished - 2016
Event23rd International Congress on Sound and Vibration, ICSV 2016 - Athens, Greece
Duration: Jul 10 2016Jul 14 2016

Other

Other23rd International Congress on Sound and Vibration, ICSV 2016
CountryGreece
CityAthens
Period7/10/167/14/16

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All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality
  • Acoustics and Ultrasonics

Cite this

Wang, X., Koba, Y., Ishikawa, S., & Kijimoto, S. (2016). Locally global active noise control based on wavefront synthesis. In ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics International Institute of Acoustics and Vibrations.