NDLI: An adaptive close-talking microphone array

Content Provider	IEEE Xplore Digital Library
Author	Elko, G.W. West, J.E. Kubli, R.A.
Copyright Year	1998
Description	Author affiliation: Lucent Technols., Bell Labs, Murray Hill, NJ, USA (Elko, G.W.)
Abstract	Directional microphones are best noted for their noise reduction properties in communication systems. Close-talking differential microphones are particularly useful when the noise environment disturbs the ability to communicate without error, such as in public and cellular telephony, aircraft communications, etc. These differential microphones work best when they are spaced within 1 cm from the lips of the talker where the sound field has a large gradient. For a plane-wave sound field, the sensitivity rises proportional to /spl omega//sup n/ where n is the order of the difference. Users of differential microphones do not always correctly position the sensor at the proper distance from the mouth and therefore the sensitivity of the microphone may also rise proportional to /spl omega//sup n/ especially at high frequencies. We describe a method of correcting for this high frequency gain without significantly degrading the noise canceling properties of first and second-order differential microphones.
Starting Page	404
Ending Page	408
File Size	458242
Page Count	5
File Format	PDF
ISBN	0780351487
ISSN	10586393
DOI	10.1109/ACSSC.1998.750895
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-11-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microphone arrays Adaptive arrays Acoustic noise Frequency Noise reduction Working environment noise Telephony Aircraft Lips Acoustic sensors
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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