Digital loudspeaker technology: current state and future developments

Simon Busbridge; Peter A. Fryer; Y. Huang

Digital loudspeaker technology: current state and future developments

Simon Busbridge, Peter A. Fryer, Y. Huang

University of Brighton

Research output: Chapter in Book/Conference proceeding with ISSN or ISBN › Conference contribution with ISSN or ISBN › peer-review

Abstract

A digital loudspeaker produces a quantised sound field directly from a digital stimulus without a digital to analogue converter. Reproduction accuracy improves if the conversion is done as late as possible in the audio chain. This paper assesses the relative merits of the two currently competing technologies, digital transducer arrays and multiple voice coils, as well as possible alternatives, by considering the underlying principles. The requirements for crossovers and drive electronics are discussed, and the performance of prototype systems is reported. Methods to extend the present manufacturability to 16 bits include the use of semiconductor mass fabrication techniques in the case of arrays and applications of oversampling and noise shaping. In the latter case the psychoacoustic implications must be understood

Original language	English
Title of host publication	Proc. 112th AES Convention
Place of Publication	Munich
Publisher	Audio Engineering Society
Pages	0-0
Number of pages	1
Publication status	Published - 1 Apr 2002
Event	Proc. 112th AES Convention - MOC Centre, Munich, April 2002 Duration: 1 Apr 2002 → …

Conference

Conference	Proc. 112th AES Convention
Period	1/04/02 → …

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http://www.aes.org/e-lib/browse.cfm?elib=11436Licence: Unspecified

Cite this

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abstract = "A digital loudspeaker produces a quantised sound field directly from a digital stimulus without a digital to analogue converter. Reproduction accuracy improves if the conversion is done as late as possible in the audio chain. This paper assesses the relative merits of the two currently competing technologies, digital transducer arrays and multiple voice coils, as well as possible alternatives, by considering the underlying principles. The requirements for crossovers and drive electronics are discussed, and the performance of prototype systems is reported. Methods to extend the present manufacturability to 16 bits include the use of semiconductor mass fabrication techniques in the case of arrays and applications of oversampling and noise shaping. In the latter case the psychoacoustic implications must be understood",

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AB - A digital loudspeaker produces a quantised sound field directly from a digital stimulus without a digital to analogue converter. Reproduction accuracy improves if the conversion is done as late as possible in the audio chain. This paper assesses the relative merits of the two currently competing technologies, digital transducer arrays and multiple voice coils, as well as possible alternatives, by considering the underlying principles. The requirements for crossovers and drive electronics are discussed, and the performance of prototype systems is reported. Methods to extend the present manufacturability to 16 bits include the use of semiconductor mass fabrication techniques in the case of arrays and applications of oversampling and noise shaping. In the latter case the psychoacoustic implications must be understood

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Digital loudspeaker technology: current state and future developments

Abstract

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