Abstract
Side-branch Helmholtz resonators are widely used in duct tonal noise control and the developing semi active control enables the classical control method works effectively under changing environments. The duct system is always accompanied with flow for air exchange or heat transfer. However, the flow has a significant impact on the sound absorption performance of the resonator. The main purpose of this paper is to investigate the effect of flow on the semi active Helmholtz resonator for duct noise control. The discontinuity condition at the joint due to a low Mach number flow is analytically formulated according to the conservation of the momentum and mass of air flow. The discontinuity function is used for deriving the controller transfer function. The proposed transfer function optimally tunes the termination impedance of Helmholtz resonator to reach a broadband noise control.
Original language | English |
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Title of host publication | 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 |
Pages | 2609-2613 |
Number of pages | 5 |
Volume | 3 |
Publication status | Published - 1 Dec 2011 |
Event | 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 - Osaka, Japan Duration: 4 Sept 2011 → 7 Sept 2011 |
Conference
Conference | 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 |
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Country/Territory | Japan |
City | Osaka |
Period | 4/09/11 → 7/09/11 |
Keywords
- Flow
- Helmholtz resonator
- Semi active control
ASJC Scopus subject areas
- Acoustics and Ultrasonics