A new microphone system for near whispering
SCIE
SCOPUS
- Title
- A new microphone system for near whispering
- Authors
- Choi, S; Moon, W; Lee, JH
- Date Issued
- 2003-08
- Publisher
- ACOUSTICAL SOC AMER AMER INST PHYSICS
- Abstract
- A new microphone system was developed to monitor the human voice near the microphone in a noisy environment. The system is equipped with two special functions in addition to the usual microphone functions: reduction of air-blow effects by the mouth and focused reception to a sound source. A wind filter was developed to reduce the air-blow effects from the mouth during speaking. This filter is a plate perforated by an array of small holes; the method used to design the filter is also presented. To achieve focused reception, four microphones were used in conjunction with a new signal-processing method. The proposed signal-processing method effectively increases the directivity in the desired direction. Additionally, it provides the system with focusing on the source since the source is located adjacent to the system. A prototype of the proposed system was fabricated and subjected to performance tests. The results showed that air-blow effects can be reduced by up to 20 dB and the directional gain is more than 4 dB. The proposed microphone system shows such good performance that it can be used in mobile phones for whispering communication. (C) 2003 Acoustical Society of America.
- Keywords
- ROOMS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18414
- DOI
- 10.1121/1.1589752
- ISSN
- 0001-4966
- Article Type
- Article
- Citation
- JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 114, no. 2, page. 801 - 812, 2003-08
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