Effect of a low Mach number flow on a semi active Helmholtz resonator

Xiaofeng Shi, Cheuk Ming Mak, Junfang Wang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Semi-active Helmholtz resonators are used to reduce noise in ducts. The Helmholtz resonators incorporated with an active noise control system work effectively over a widen frequency range. In duct system, noise is generated by ventilation devices and the flow accompanied significantly influence the noise reduction performance of the semi-active Helmholtz resonator. In this paper, the effect of flow on a semi-active Helmholtz resonator is investigated. The side branch Helmholtz resonator is terminated by an active control device which adjusted to tune the resonance frequency. Base on a simplified model which describes the transmission loss under a low Mach number mean flow, the flow effect is considered in the active noise control algorithm. The derived transfer fiinction optimally adjusts the termination impedance to control noise in a low Mach mean flow duct.
Original languageEnglish
Title of host publication19th International Congress on Sound and Vibration 2012, ICSV 2012
Pages133-137
Number of pages5
Volume1
Publication statusPublished - 1 Dec 2012
Event19th International Congress on Sound and Vibration 2012, ICSV 2012 - Vilnius, Lithuania
Duration: 8 Jul 201212 Jul 2012

Conference

Conference19th International Congress on Sound and Vibration 2012, ICSV 2012
Country/TerritoryLithuania
CityVilnius
Period8/07/1212/07/12

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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