Title
Comparison of various decentralised structural and cavity feedback control strategies for transmitted noise reduction through a double panel structure
Author
Ho, J.H.
Berkhoff, A.P.
Publication year
2014
Abstract
This paper compares various decentralised control strategies, including structural and acoustic actuator-sensor configuration designs, to reduce noise transmission through a double panel structure. The comparison is based on identical control stability indexes. The double panel structure consists of two panels with air in between and offers the advantages of low sound transmission at high frequencies, low heat transmission, and low weight. The double panel structure is widely used, such as in the aerospace and automotive industries. Nevertheless, the resonance of the cavity and the poor sound transmission loss at low frequencies limit the double panel's noise control performance. Applying active structural acoustic control to the panels or active noise control to the cavity has been discussed in many papers. In this paper, the resonances of the panels and the cavity are considered simultaneously to further reduce the transmitted noise through an existing double panel structure. A structural-acoustic coupled model is developed to investigate and compare various structural control and cavity control methods. Numerical analysis and real-time control results show that structural control should be applied to both panels. Three types of cavity control sources are presented and compared. The results indicate that the largest noise reduction is obtained with cavity control by loudspeakers modified to operate as incident pressure sources. © 2013 Elsevier Ltd.
Subject
Physics & Electronics
AS - Acoustics & Sonar
TS - Technical Sciences
High Tech Systems & Materials
Acoustics and Audiology
Industrial Innovation
Noise reduction
Noise cancelling
Acoustic wave propagation
Double panel structure
Numerical analysis
Cavity control
To reference this document use:
http://resolver.tudelft.nl/uuid:ba4a4d48-b114-45ec-8f5f-6bd10cdc2ad2
DOI
https://doi.org/10.1016/j.jsv.2013.11.018
TNO identifier
488255
ISSN
0022-460X
Source
Journal of Sound and Vibration, 333 (7), 1857-1873
Document type
article