An acoustic radiator with integrated cavity and active control of surface vibration
conference paper
This paper presents a method to realize an acoustic source for low frequencies with relatively small thickness. A honeycomb plate structure which 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 caused by the mass of the plate and the compliance of the air cavity are controlled, as well as the first-order bending mode, 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.
Topics
TNO Identifier
777347
Source
Audio Engineering Society Convention paper presented at 142nd Convention 2017 may 20-23rd Berlin, Germany, pp. 5 p..
Publisher
Audio Engineering Society
Source title
142nd Audio Engineering Society International Convention 2017, AES 2017. 20 May 2017 through 23 May 2017
Pages
5 p.
Files
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