Title
Development of Dynamic Loudspeakers Modified as Incident Pressure Sources for Noise Reductiuon in a Double Panel Structure
Author
Ho, J.H.
Berkhoff, A.P.
Publication year
2013
Abstract
This paper presents a modified loudspeaker source for decentralized feedback cavity control in a double panel structure to reduce the noise transmission. The double panel structure con-sists of two panels with air in between and offers the advantages of low weight, low sound transmission at high frequencies, and thermal insulation. The main issues of the double panel structure are the resonance of the cavity and the high noise transmission at low frequencies. Many papers have discussed applying active structural acoustic control to the panels or active noise control to the cavity. In our previous study, we considered the resonance of the panels and the cavity simultaneously and numerically compared various decentralized structural and cavity feedback control strategies basing on identical control stability margins. Cavity control by loudspeakers, which are modified to operate as incident pressure sources, was found to-provide the largest noise reduction. The incident pressure source loudspeaker can be realized by using a dynamic loudspeaker, a microphone, and a velocity sensor with a feedforward controller. In this paper, experimental results of a one dimensional realization with a feed-forward controller are presented.
Subject
Physics & Electronics
AS - Acoustics & Sonar
TS - Technical Sciences
High Tech Systems & Materials
Acoustics and Audiology
Industrial Innovation
Noise Transmission
Sandwich Panels
Active Noise Control
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http://resolver.tudelft.nl/uuid:5145ae74-2643-4d43-99ef-e0db561d9042
TNO identifier
480965
Publisher
International Institute of Acoustics and Vibration, Auburn, AL
Source
20th International Congress on Sound and Vibration 2013, ICSV20, 7-11 July 2013, Bangkok, Thailand
Document type
conference paper