Bit expansion in digital loudspeakers with oversampling and noise shaping

Haihua Zhang; Simon Busbridge; Peter A. Fryer

Bit expansion in digital loudspeakers with oversampling and noise shaping

Haihua Zhang, 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

The resolution of true digital loudspeakers is currently limited by their physical construction. Transducer arrays require 2 to the Nth power minus 1 speaklets and multiple voice coil topologies require N coils (N = the number of bits). Oversampling and noise shaping has been used to maintain resolution with fewer bits. Results are presented where the oversampled signal falls both within and outside of the bandwidth of the radiator. A linear model is being developed to understand the observations. The radiator displacement shows little difference between the original and oversampled cases. It is concluded that the limited bandwidth of existing acoustical radiators is advantageous in acting as the re-integration filter. In circumstances where this is not possible the auditory system may perform this task

Original language	English
Title of host publication	116th AES Convention Papers
Place of Publication	Berlin
Pages	0-0
Number of pages	1
Publication status	Published - 1 May 2004
Event	116th AES Convention Papers - Berlin, 8 - 11 May, 2004 Duration: 1 May 2004 → …

Conference

Conference	116th AES Convention Papers
Period	1/05/04 → …

Access to Document

http://www.aes.org/e-lib/browse.cfm?elib=12619Licence: Unspecified

Cite this

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title = "Bit expansion in digital loudspeakers with oversampling and noise shaping",

abstract = "The resolution of true digital loudspeakers is currently limited by their physical construction. Transducer arrays require 2 to the Nth power minus 1 speaklets and multiple voice coil topologies require N coils (N = the number of bits). Oversampling and noise shaping has been used to maintain resolution with fewer bits. Results are presented where the oversampled signal falls both within and outside of the bandwidth of the radiator. A linear model is being developed to understand the observations. The radiator displacement shows little difference between the original and oversampled cases. It is concluded that the limited bandwidth of existing acoustical radiators is advantageous in acting as the re-integration filter. In circumstances where this is not possible the auditory system may perform this task",

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N2 - The resolution of true digital loudspeakers is currently limited by their physical construction. Transducer arrays require 2 to the Nth power minus 1 speaklets and multiple voice coil topologies require N coils (N = the number of bits). Oversampling and noise shaping has been used to maintain resolution with fewer bits. Results are presented where the oversampled signal falls both within and outside of the bandwidth of the radiator. A linear model is being developed to understand the observations. The radiator displacement shows little difference between the original and oversampled cases. It is concluded that the limited bandwidth of existing acoustical radiators is advantageous in acting as the re-integration filter. In circumstances where this is not possible the auditory system may perform this task

AB - The resolution of true digital loudspeakers is currently limited by their physical construction. Transducer arrays require 2 to the Nth power minus 1 speaklets and multiple voice coil topologies require N coils (N = the number of bits). Oversampling and noise shaping has been used to maintain resolution with fewer bits. Results are presented where the oversampled signal falls both within and outside of the bandwidth of the radiator. A linear model is being developed to understand the observations. The radiator displacement shows little difference between the original and oversampled cases. It is concluded that the limited bandwidth of existing acoustical radiators is advantageous in acting as the re-integration filter. In circumstances where this is not possible the auditory system may perform this task

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ER -

Bit expansion in digital loudspeakers with oversampling and noise shaping

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