Tinnitus masking therapy is adjusting masking sound based on the spectrum and loudness of tinnitus, so as to making it matches with type of tinnitus perception, reaching the goal of masking tinnitus. Cicadas is the most common type of tinnitus perception, but different patients’ perception of tinnitus is not the same, so researching the diversed analysis methods of cicadas is critical. To address the problem of not enough of tinnitus matched sound source, we synthesis cicadas sound making use of the Hilbert Huang Transform developed rapidly in recent years cobined with amplitude modulation frequency modulation model (AM FM). First, taking advantage of the adaptive band pass filter characteristic of the overall average empirical mode decomposition method, after, we separated different formant and calculate their instantaneous frequency and amplitude by normalized Hilbert algorithm, then synthesised cicadas sound combined with AM FM. Experimental results indicate that this method has an ideal effect, which makes it a valuable medical reference.
