김인영
2018-02-12T05:47:54Z
2018-02-12T05:47:54Z
2011-09
의공학회지, 2011, 32(3), P.198-206
1229-0807
http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OOSCB@_2011_v32n3_198
Hearing devices like cochlear implant, vibrant soundbridge, etc. try to offer better sound for people. In hearing devices, several beamformers including conventional directional microphone are applicable to noise reduction. Each beamformer has different directional response and it could change sound intelligibility or quality for listeners. Therefore, we investigated the performance of three beamformers, which are first and second order directional microphone, and broadband beamformer(BBF) with a computer simulation assuming hearing device microphone configuration. We also calculated objective measurements which have been used to evaluate speech enhancement algorithms. In the simulation, a single speech and a single babble noisewere propagated from the front and $135^{\circ}$ azimuth degrees respectively. Microphones were configured in an end-fire array and the spacing was varied in comparison. With 3 cm spacing, BBF had about 3 dB higher enhanced SNR than that of directional microphones. However, enhancement of segmental SNR and frequency weighted segmental SNR were similar between the first order directional microphone and broadband beamformer. In addition when steady state noise was used, broadband beamformer showed the increased performance and had the highest enhanced SNR, and segmental SNR.
본 연구는 지식경제부 바이오의료기기전략기술개발사업의 지원으로 이루어졌음(과제번호: 10031764).
ko_KR
대한의용생체공학회
beamforming
hearing device
청각기기
빔포밍
2채널 마이크로폰을 이용한 청각 기기에서의 빔포밍에 대한 객관적 검증
Objective Evaluation of Beamforming Techniques for Hearing Devices with Two-channel Microphone
Article
3
32
10.9718/JBER.2011.32.3.198
198-206
의공학회지
조경원
한종희
홍성화
이상민
김동욱
김인영
김선일
Cho, Kyeong-Won
Han, Jong-Hee
Hong, Sung-Hwa
Lee, Sang-Min
Kim, Dong-Wook
Kim, In-Young
Kim, Sun-I.
2012214535
S
COLLEGE OF MEDICINE[S]
DEPARTMENT OF MEDICINE
iykim