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.
