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为减小助听器系统中传统响度补偿方法中语音可听和畸变之间的矛盾,提出了一种自适应的多通道响度补偿方法.该方法根据带通信号的动态范围和患者的听阈交替使用线性方法和动态范围压缩方法.为进一步减小动态范围压缩引起的畸变,并提高噪声环境下的输出信噪比,给出了一种自适应调整压缩比的方法.实验结果表明,与WDRC动态范围压缩补偿方法相比,所提方法在语噪声环境下的输出信噪比至少提高了1.73 dB;与线性和动态范围压缩补偿方法相比,所提方法的平均语音可懂度分别提升了6.0%和5.7%.
In order to reduce the contradiction between audible and distortion of speech in the traditional loudness compensation method of hearing aid system, an adaptive multi-channel loudness compensation method is proposed, which is based on the linearity of the dynamic range of the bandpass signal and the patient’s hearing threshold Method and dynamic range compression method.In order to further reduce the distortion caused by the dynamic range compression and improve the output signal to noise ratio in the noise environment, a method of adaptively adjusting the compression ratio is given.Experimental results show that, compared with the WDRC dynamic range Compared with the compression compensation method, the proposed method improves the signal-to-noise ratio of output by at least 1.73 dB under the noisy environment. Compared with the linear and dynamic range compression compensation methods, the average speech intelligibility of the proposed method increases by 6.0% And 5.7%.