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Thursday, October 28 • 9:00pm - Friday, December 3 • 6:00pm
Audio-Source Rendering on Flat-Panel Loudspeakers with Non-Uniform Boundary Conditions

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Devices from smartphones to televisions are beginning to employ dual purpose displays, where the display serves as both a video screen and a loudspeaker. In this paper we demonstrate a method to generate localized sound-radiating regions on a flat-panel display. An array of force actuators affixed to the back of the panel is driven by appropriately filtered audio signals so the total response of the panel due to the actuator array approximates a target spatial acceleration profile. The response of the panel to each actuator individually is initially measured via a laser vibrometer, and the required actuator filters for each source position are determined by an optimization procedure that minimizes the mean squared error between the reconstructed and targeted acceleration profiles. Since the single-actuator panel responses are determined empirically, the method does not require analytical or numerical models of the system’s modal response, and thus is well-suited to panels having the complex boundary conditions typical of television screens, mobile devices, and tablets. The method is demonstrated on two panels with differing boundary conditions. When integrated with display technology, the localized audio source rendering method may transform traditional displays into multimodal audio-visual interfaces by colocating localized audio sources and objects in the video stream.


Michael Heilemann

Assistant Professor, University of Rochester
avatar for Tre DiPassio

Tre DiPassio

PhD Student, University of Rochester
Hello! My name is Tre, and I am in my final semester as a PhD student studying musical acoustics and signal processing under the supervision of Dr. Mark Bocko and Dr. Michael Heilemann. The research lab I am a part of has been developing an emerging type of speaker, called a flat... Read More →

Mark Bocko

University of Rochester

Thursday October 28, 2021 9:00pm - Friday December 3, 2021 6:00pm EST