Bhat Gautam S, Reddy Chandan K A, Shankar Nikhil, Panahi Issa M S
Annu Int Conf IEEE Eng Med Biol Soc. 2018 Jul;2018:5503-5506. doi: 10.1109/EMBC.2018.8513674.
In this paper, we present a Speech Enhancement (SE) technique to improve intelligibility of speech perceived by Hearing Aid users using smartphone as an assistive device. We use the formant frequency information to improve the overall quality and intelligibility of the speech. The proposed SE method is based on new super Gaussian joint maximum a Posteriori (SGJMAP) estimator. Using the priori information of formant frequency locations, the derived gain function has " tradeoff" factors that allows the smartphone user to customize perceptual preference, by controlling the amount of noise suppression and speech distortion in real-time. The formant frequency information helps the hearing aid user to control the gains over the non-formant frequency band, allowing the HA users to attain more noise suppression while maintaining the speech intelligibility using a smartphone application. Objective intelligibility measures and subjective results reflect the usability of the developed SE application in noisy real world acoustic environment.
在本文中，我们提出了一种语音增强（SE）技术，以提高使用智能手机作为辅助设备的助听器用户所感知语音的清晰度。我们利用共振峰频率信息来提高语音的整体质量和清晰度。所提出的SE方法基于新的超高斯联合最大后验（SGJMAP）估计器。利用共振峰频率位置的先验信息，导出的增益函数具有“权衡”因子，使智能手机用户能够通过实时控制噪声抑制量和语音失真来定制感知偏好。共振峰频率信息有助于助听器用户控制非共振峰频段的增益，使助听器用户在使用智能手机应用程序时，在保持语音清晰度的同时获得更多的噪声抑制。客观清晰度测量和主观结果反映了所开发的SE应用在嘈杂的现实世界声学环境中的可用性。
