A comparison of hearing-aid array-processing techniques
A comparison of hearing-aid array-processing techniques
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DOI：
10.1121/1.414798
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发表时间：
1996-05-01
影响因子：
2.4
通讯作者：
Weiss, MR
中科院分区：
文献类型：
--
作者：
Kates, JM;Weiss, MR
麦克风阵列已被证明在提高听力受损听众在噪声中的语音清晰度方面是有效的，并且已经提出了几种用于助听器的阵列处理技术。在信号处理方法中，有经典的延迟和波束形成、超定向阵列和自适应阵列。为了直接比较这些不同处理策略的有效性，使用五个均匀间隔的全向麦克风构建了一个10厘米长的线性阵列。该阵列用于末端射击方向，为两个代表室的各种阵列位置采集语音和噪声信号。同时考虑了数字和模拟处理技术，其中阵列处理在频域中实现。性能指标是稳态阵列增益加权，以表示不同频率区域在理解语音中的相对重要性。处理比较表明，数字系统比模拟模拟处理更有效，超定向和自适应数字阵列处理都可以提供超过9db的加权阵列增益。(C)1996年美国声学学会。
Microphone arrays have proven effective in improving speech intelligibility in noise for hearing-impaired listeners, and several array processing techniques have been proposed for hearing aids. Among the signal-processing approaches are classical delay-and-sum beamforming, superdirective arrays, and adaptive arrays. To directly compare the effectiveness of these different processing strategies, a 10-cm-long linear array was built using five uniformly spaced omnidirectional microphones. This array was used in the end-fire orientation to acquire speech and noise signals for a variety of array placements in two representative rooms. Both digital and simulated analog processing techniques were considered, with the array processing implemented in the frequency domain. The performance metric was the steady-state array gain weighted to represent the relative importance of the different frequency regions in understanding speech. The processing comparison indicates that digital systems are more effective than the simulated analog processing, and that both superdirective and adaptive digital array processing can provide more than 9 dB of weighted array gain. (C) 1996 Acoustical Society of America.