638 Frequency Dependence of the Sound Conduction Path of the Vibration Directly Applied to the Skull : from Low Frequency to Ultra Sound Frequency
Details
When a skull is vibrated by a vibrator, we can perceive a sound. The applied vibration is supposed to be transmitted to the cochlea through the temporal bone, and this sound path is called bone-conduction. However, our preliminary experiments showed that sound pressure is generated in the external auditory meatus when a skull is vibrated, and the sound pressure strongly influences perception of sound at low frequencies. In this study, the sound pressure in the external auditory meatus generated by the vibration of 0.2〜40kHz applied to a skull was measured. The results showed that the influence of the sound pressure generated in external auditory meatus on perception of the sound decreases with increasing the frequency.
