Sound field characterisation in audio reproduction with the bit-grouped digital transducer array

Jorge Mendoza-López; Simon Busbridge; Peter A. Fryer

Sound field characterisation in audio reproduction with the bit-grouped digital transducer array

Jorge Mendoza-López, Simon Busbridge, Peter A. Fryer

University of Brighton

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

Abstract

A bit-grouped digital transducer array loudspeaker with different numbers of nominally identical transducers for each bit has been developed. The direct digital-to-acoustic conversion process produces a sound field whose quality is shown to be spatially dependent and highly influenced by real effects including non-uniform transducer frequency responses, transducer mismatching, baffle size and room acoustics. Spatial sound pressure maps show that reducing the array size leads to improved reconstruction due to reduced phase distortion. For a given sampling rate and signal frequency, total harmonic distortion decreases as the listening distance is increased. A new criterion for the sweet-spot location in digital arrays is proposed based on the difference between the distortion introduced by path-length differences and the inherent quantisation distortion.

Original language	English
Title of host publication	Proceedings of the 120th AES Convention
Place of Publication	Paris
Publisher	AES
Pages	0-0
Number of pages	1
Publication status	Published - 1 Jan 2006
Event	Proceedings of the 120th AES Convention - Paris Expo, May 20-23, 2006 Duration: 1 Jan 2006 → …

Conference

Conference	Proceedings of the 120th AES Convention
Period	1/01/06 → …

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http://www.aes.org/e-lib/browse.cfm?elib=13639Licence: Unspecified

Cite this

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title = "Sound field characterisation in audio reproduction with the bit-grouped digital transducer array",

abstract = "A bit-grouped digital transducer array loudspeaker with different numbers of nominally identical transducers for each bit has been developed. The direct digital-to-acoustic conversion process produces a sound field whose quality is shown to be spatially dependent and highly influenced by real effects including non-uniform transducer frequency responses, transducer mismatching, baffle size and room acoustics. Spatial sound pressure maps show that reducing the array size leads to improved reconstruction due to reduced phase distortion. For a given sampling rate and signal frequency, total harmonic distortion decreases as the listening distance is increased. A new criterion for the sweet-spot location in digital arrays is proposed based on the difference between the distortion introduced by path-length differences and the inherent quantisation distortion.",

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N2 - A bit-grouped digital transducer array loudspeaker with different numbers of nominally identical transducers for each bit has been developed. The direct digital-to-acoustic conversion process produces a sound field whose quality is shown to be spatially dependent and highly influenced by real effects including non-uniform transducer frequency responses, transducer mismatching, baffle size and room acoustics. Spatial sound pressure maps show that reducing the array size leads to improved reconstruction due to reduced phase distortion. For a given sampling rate and signal frequency, total harmonic distortion decreases as the listening distance is increased. A new criterion for the sweet-spot location in digital arrays is proposed based on the difference between the distortion introduced by path-length differences and the inherent quantisation distortion.

AB - A bit-grouped digital transducer array loudspeaker with different numbers of nominally identical transducers for each bit has been developed. The direct digital-to-acoustic conversion process produces a sound field whose quality is shown to be spatially dependent and highly influenced by real effects including non-uniform transducer frequency responses, transducer mismatching, baffle size and room acoustics. Spatial sound pressure maps show that reducing the array size leads to improved reconstruction due to reduced phase distortion. For a given sampling rate and signal frequency, total harmonic distortion decreases as the listening distance is increased. A new criterion for the sweet-spot location in digital arrays is proposed based on the difference between the distortion introduced by path-length differences and the inherent quantisation distortion.

M3 - Conference contribution with ISSN or ISBN

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ER -

Sound field characterisation in audio reproduction with the bit-grouped digital transducer array

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