一种蝉鸣声数字化建模的改进方法
An improved method on digital model of male cicada sounding

蝉鸣声是耳鸣掩蔽治疗最常用的一种匹配声源, 而目前数字化合成的蝉鸣声存在声音机械的问题. 针对该问题, 本文对蝉鸣合成数字化模型的激励源、声源模型和声道模型进行了优化: 使用滤波成型波作为激励源; 在声源信号中加入第二泛音分量; 对声道模型的参数进行修改. 最终合成的蝉鸣声在频谱丰富度和声音自然度得到了优化, 对耳鸣的掩蔽治疗提供了技术参考.
Cicadas sound is one of commonly used matching sound sources in the masking treatment of tinnitus, and cicadas sound by digital synthesis faces the problem of being monotonous in spectrum and mechanical in sound currently. Some optimization on excitation source, sound source and the channel model of male cicada’s model is carried out: using wave of shaping filter as exciting source, adding second Harmonics component to the sound source and modifying the parameters of the channel model. Eventually, a certain degree of optimization on enhancing richness of synthesized cicadas sound’ s spectrum and naturalness has been obtained. The optimization and improvement to digital model of male cicada supplies technical reference for treatment of tinnitus masking