Lee Ching-Hua, Kates James M, Rao Bhaskar D, Garudadri Harinath
Department of Electrical and Computer Engineering, University of California, San Diego, California 92093, USA.
Department of Speech, Language, and Hearing Sciences, University of Colorado, Boulder, Colorado 80309, USA
J Acoust Soc Am. 2017 Oct;142(4):EL388. doi: 10.1121/1.5007278.
This paper addresses trade-offs in adaptive feedback cancellation (AFC) for hearing aids. Aggressive AFC for improved added stable gain (ASG) reduces speech quality. In this paper, the hearing-aid speech quality index (HASQI) is used to investigate AFC performance before the system becomes unstable. It is demonstrated that for a desired speech quality, multiple AFC algorithms can be evaluated for their ASG and computational efficiency. An example is presented with HASQI = 0.8, baseline AFC, and two advanced approaches. For the advanced AFCs, ASG gains of 4 and 7 dB were obtained at additional computational complexity of 8% and 11%, respectively.
本文探讨了助听器自适应反馈抵消（AFC）中的权衡问题。为提高附加稳定增益（ASG）而采用的激进AFC会降低语音质量。在本文中，助听器语音质量指数（HASQI）用于研究系统变得不稳定之前的AFC性能。结果表明，对于期望的语音质量，可以评估多种AFC算法的ASG和计算效率。给出了一个HASQI = 0.8、基线AFC以及两种先进方法的示例。对于先进的AFC，分别在额外增加8%和11%的计算复杂度的情况下获得了4 dB和7 dB的ASG增益。
