This paper presents a method to realize an acoustic source for low frequencies with relatively small thickness. A honeycomb plate structure that is open on one side combines the radiating surface and the major part of the air cavity. The vibration of the plate is controlled with a decentralized feedback controller. The fundamental resonance is controlled, as well as higher-order bending modes, while avoiding possible instabilities due to the fluid-structure interaction. The smooth and well defined frequency response enables robust feedforward control for further response equalization. The influence of different actuation principles on the overall system efficiency is compared.

Authors: Berkhoff, Arthur; Tajdari, Farnaz
Affiliations: University of Twente, Enschede, The Netherlands; TNO Acoustics and Sonar, The Hague, The Netherlands(See document for exact affiliation information.)
AES Convention: 142 (May 2017) Paper Number: 9694
Publication Date: May 11, 2017
Subject: Transducers 1

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