Abstract
We describe two cases of objective tinnitus due to involuntary muscular spasm. The tinnitus in a 5-year-old boy manifested itself as a clicking sound with a peak energy spectrum of 2kHz. A depression of the eardrum and a high compliance value in the impedance audiometry were found to demonstrate a close correlation with the tinnitus. In contrast, another case of tinnitus in a 45-year-old female manifested itself with a peak energy spectrum of 500Hz. A spasm in the soft palate was also found to correlate with the tinnitus. These findings indicate that the one type of tinnitus was caused by spasms in the tensor veli palatini muscle and the tensor tympani muscle while the other case of tinnitus was caused by spasms in the levator veli palatini muscle.
