Pick-up of Bone Conduction with Multiple Microphones and Quality Improvement of Bone Conducted Speech

针对骨传导传声器单次使用的情况，对骨传导语音基频检测进行了研究，并推导了一种检测方法，该方法在高噪声环境下也能提供良好的检测性能。对骨传导语音的时域振幅进行了研究，发现将骨传导语音的振幅转换为空气传导语音的振幅可以提高语音质量。针对多用途骨传导传声器的情况，构建了一个包含自适应滤波器的多输入单输出系统。研究了提高语音质量的最佳算法。

For the case of single use of a bone conducted microphone, fundamental frequency detection with bone conducted speech was investigated, and a detection method was derived, which provides a good performance even in highly noisy environments. Amplitude of bone conducted speech was investigated in the time domain, and it was found that a transform of amplitude of bone conducted speech into that of air conducted speech leads to an improvement of speech quality. For teh case of multiple use of bone conducted microphones, a multi-input single-output system was constructed involving adaptive filters. Algorithms to provide the best improvement of speech quality were investigated.