An Improved Method of Noise Rejection

Simon Busbridge; David Herman; Dudley Haestler

An Improved Method of Noise Rejection

Simon Busbridge, David Herman, Dudley Haestler

University of Brighton

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

Abstract

The effectiveness of conventional noise cancellation techniques is limited by tolerances between the signal path and noise path. A system is described in which the ambient noise error signal is fed back for further cancellation (Advanced ambient Noise Rejection Technology, ANRT). Two microphones slightly separated differentiate near field signals from high level ambient noise. Band limiting filters further reduce high frequency phase distortion. The effectiveness is increased such that an unintelligible signal produced by normal speech can result in a SNR improvement of 40 dB in an ambient noise field of 98 dBA. The technology can be integrated into a single, small low power CMOS analogue integrated circuit; it is also ideally suited for MEMS (Si-Mic).

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

Conference

Conference	Proc. 116th AES Convention
Period	1/01/04 → …

Access to Document

http://www.aes.org/e-lib/browse.cfm?elib=12621Licence: Unspecified

Cite this

@inproceedings{9454a8e9e6024183b1b124d8e073cb60,

title = "An Improved Method of Noise Rejection",

abstract = "The effectiveness of conventional noise cancellation techniques is limited by tolerances between the signal path and noise path. A system is described in which the ambient noise error signal is fed back for further cancellation (Advanced ambient Noise Rejection Technology, ANRT). Two microphones slightly separated differentiate near field signals from high level ambient noise. Band limiting filters further reduce high frequency phase distortion. The effectiveness is increased such that an unintelligible signal produced by normal speech can result in a SNR improvement of 40 dB in an ambient noise field of 98 dBA. The technology can be integrated into a single, small low power CMOS analogue integrated circuit; it is also ideally suited for MEMS (Si-Mic).",

author = "Simon Busbridge and David Herman and Dudley Haestler",

year = "2004",

month = jan,

day = "1",

language = "English",

pages = "0--0",

booktitle = "Proc. 116th AES Convention",

publisher = "AES",

note = "Proc. 116th AES Convention ; Conference date: 01-01-2004",

}

TY - GEN

T1 - An Improved Method of Noise Rejection

AU - Busbridge, Simon

AU - Herman, David

AU - Haestler, Dudley

PY - 2004/1/1

Y1 - 2004/1/1

N2 - The effectiveness of conventional noise cancellation techniques is limited by tolerances between the signal path and noise path. A system is described in which the ambient noise error signal is fed back for further cancellation (Advanced ambient Noise Rejection Technology, ANRT). Two microphones slightly separated differentiate near field signals from high level ambient noise. Band limiting filters further reduce high frequency phase distortion. The effectiveness is increased such that an unintelligible signal produced by normal speech can result in a SNR improvement of 40 dB in an ambient noise field of 98 dBA. The technology can be integrated into a single, small low power CMOS analogue integrated circuit; it is also ideally suited for MEMS (Si-Mic).

AB - The effectiveness of conventional noise cancellation techniques is limited by tolerances between the signal path and noise path. A system is described in which the ambient noise error signal is fed back for further cancellation (Advanced ambient Noise Rejection Technology, ANRT). Two microphones slightly separated differentiate near field signals from high level ambient noise. Band limiting filters further reduce high frequency phase distortion. The effectiveness is increased such that an unintelligible signal produced by normal speech can result in a SNR improvement of 40 dB in an ambient noise field of 98 dBA. The technology can be integrated into a single, small low power CMOS analogue integrated circuit; it is also ideally suited for MEMS (Si-Mic).

M3 - Conference contribution with ISSN or ISBN

SP - 0

EP - 0

BT - Proc. 116th AES Convention

PB - AES

CY - Berlin

T2 - Proc. 116th AES Convention

Y2 - 1 January 2004

ER -

An Improved Method of Noise Rejection

Abstract

Conference

Access to Document

Fingerprint

Cite this