다중 거리 센서를 사용한 강의용 광역 마이크 시스템

• Published in: 한국정보통신학회논문지 Vol. 26; no. 5; pp. 808 - 811
• Main Author: Oh, Woojin
• Format: Journal Article
• Language: Korean
• Published: 한국정보통신학회 2022
• Subjects: 전자/정보통신공학; Multiple range sensor; Array microphone; Wide range microphone; Self sensor adjustment
• ISSN: 2234-4772; 2288-4165
• DOI: 10.6109/jkiice.2022.26.5.808

In this paper, a wide-range microphone system for lectures using dual 3D sensors is proposed. A previous work using a single sensor had lowering the detecting threshold to support wide-area. However it was found that an error occurred when lecturer wears clothes with low reflectivity or has small body size. When multiple sensors are used to expand the coverage it could be cause various problems. Each sensor could show different distance to the same target. We derive the rotation angle and and compensate for lecturing microphone system using sensors on the line. The proposed method shows a little improvement in performance by about 1dB compared to the previous works but the performance is uniform in all areas regardless of reflectivity.