지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
To enhance the speech perception of hearing aid users in noisy environment, most hearing aid devices adopt various beamforming algorithms such as the first-order differential microphone (DM1) and the two-stage directional microphone (DM2) algorithms that maintain sounds from the direction of the interlocutor and reduce the ambient sounds from the other directions. However, these conventional algorithms represent poor directionality ability in low frequency area. Therefore, to enhance the speech perception of hearing aid uses in low frequency range, our group had suggested a fractional delay subtraction and integration (FDSI) algorithm and estimated its theoretical performance using computer simulation in previous article. In this study, we performed a KEMAR test in non-reverberant room that compares the performance of DM1, DM2, broadband beamforming (BBF), and proposed FDSI algorithms using several objective indices such as a signal-to-noise ratio (SNR) improvement, a segmental SNR (seg-SNR) improvement, a perceptual evaluation of speech quality (PESQ), and an Itakura-Saito measure (IS). Experimental results showed that the performance of the FDSI algorithm was −3.26-7.16 dB in SNR improvement, −1.94-5.41 dB in segSNR improvement, 1.49-2.79 in PESQ, and 0.79-3.59 in IS, which demonstrated that the FDSI algorithm showed the highest improvement of SNR and segSNR, and the lowest IS. We believe that the proposed FDSI algorithm has a potential as a beamformer for digital hearing aid devices.
목차
등록된 정보가 없습니다.
참고문헌 (16)
참고문헌 신청
A. Schaub / 2008 / Digital hearing aids / Thieme
E. Mabande / 2009 / Design of robust superdirective beamformers as a convex optimization problem / in Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE Internationa
E. Rothauser / 1969 / IEEE recommended practice for speech quality measurements / IEEE Transactions on Audio Electroacoustics 17 : 227 ~ 246
F. L. Luo, J. Yang, C. Pavlovic, and A. Nehorai / 2002 / Adaptive null-forming scheme in digital hearing aids / Signal Processing, IEEE Transactions on 50 : 1583 ~ 1590
G.W. Elko / 1995 / A simple adaptive first-order differential microphone : 169 ~ 172
E. Mabande / 2009 / Design of robust superdirective beamformers as a convex optimization problem / in Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE Internationa
E. Rothauser / 1969 / IEEE recommended practice for speech quality measurements / IEEE Transactions on Audio Electroacoustics 17 : 227 ~ 246
F. L. Luo, J. Yang, C. Pavlovic, and A. Nehorai / 2002 / Adaptive null-forming scheme in digital hearing aids / Signal Processing, IEEE Transactions on 50 : 1583 ~ 1590
G.W. Elko / 1995 / A simple adaptive first-order differential microphone : 169 ~ 172
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