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首页> 外文期刊>Biomedical Engineering: Applications, Basis and Communications >THE RELATIONSHIP BETWEEN ELECTROMYOGRAPHY SIGNAL OF NECK MUSCLE AND HUMAN VOICE SIGNAL FOR CONTROLLING LOUDNESS OF ELECTROLARYNX
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THE RELATIONSHIP BETWEEN ELECTROMYOGRAPHY SIGNAL OF NECK MUSCLE AND HUMAN VOICE SIGNAL FOR CONTROLLING LOUDNESS OF ELECTROLARYNX

机译：颈肌电信号与人声信号控制电声的关系

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摘要

Human voice intonation is affected by pitch and loudness. Pitch is related to the frequency of human voice, while loudness is related to the magnitude of human voice. Someone who does not have vocal cords, has no ability to produce voice. This problem is suffered by laryngectomy patients. Over half of all laryngectomy patients worldwide use electrolarynx for the rehabilitation of their speech ability. Unfortunately, the electrolarynx voice produces monotonic and flat intonation. Small changes in pitch and loudness of electrolarynx will give a better expression in laryngectomy patients. However, previous researches have focused on utilization of electromyography (EMG) signal of neck muscle for only pitch control. In this research, the relationship between human voice intonation (i.e. frequency and magnitude) and EMG signals of neck muscles was studied by looking for their correlation and their mutual information.'Human voice signal and EMG signal of neck muscle were recorded simultaneously while subjects were saying "A" with varying intonation. The EMG signal of neck muscle was processed using amplifying, filtering, rectifying and "moving average" process. On the other hand, the human voice was processed by FFT Algorithm to obtain magnitude and fundamental frequency. The result shows that the correlation coefficient between human voice magnitudes and EMG signal of neck muscle is 0.93, while the correlation coefficient between human voice frequency and EMG signal of neck muscle is 0.88. Moreover, the mutual information between human voice magnitudes and EMG signal of neck muscle is 1.07, while the mutual information between human voice frequency and EMG signal of neck muscle is 0.65. These results show that the relationship between human voice magnitudes and EMG signal of neck muscle is stronger than the relationship between human voice frequencies and EMG signal of neck muscle. Therefore, it is more appropriate to use the EMG signal of neck muscle for controlling loudness of electrolarynx than that of the pitch of electrolarynx.
机译：人声语调受音高和响度影响。音高与人声的频率有关，而响度与人声的大小有关。没有声带的人无法发出声音。喉切除术患者遭受这个问题。全球所有喉切除术患者中有超过一半的人使用喉头来恢复其语言能力。不幸的是，电喉音产生单调而平坦的语调。电喉音高和响度的微小变化将在喉切除患者中获得更好的表达。然而，先前的研究集中于利用颈部肌肉的肌电图（EMG）信号仅用于音调控制。本研究通过寻找人的语音语调（频率和大小）与颈部肌电信号之间的相关性和相互信息来研究两者之间的关系。用不同的语调说“ A”。颈部肌肉的肌电信号使用放大，滤波，校正和“移动平均”过程进行处理。另一方面，通过FFT算法对人的声音进行处理以获得幅度和基频。结果表明，人的声音强度与颈部肌电信号的相关系数为0.93，而人的声音频率与颈部肌电信号的相关系数为0.88。此外，人的声音强度与颈部肌电信号之间的相互信息为1.07，而人的声音频率与颈部肌电信号之间的相互信息为0.65。这些结果表明，人的声音强度与颈部肌电信号之间的关系要强于人的声音频率与颈部肌电信号之间的关系。因此，使用颈部肌肉的肌电图信号来控制电喉的响度比电喉的音调更合适。

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