Abstract
Subjects with normal hearing were tested to determine thresholds of hearing when audio stimulation was applied to various teeth and the forehead at frequencies from 250 to 4000 Hz. The resulting data indicate that the teeth are more sensitive than the forehead by 5 to 10 dB in detecting the rms force applied. Comparison of the experimental results with recently published threshold values for the forehead and mastoid indicates that the teeth are comparable with the mastoid for audio sensitivity in bone conduction. This result, together with low measured power requirements, indicates that the teeth are an attractive site for the introduction of audio energy for hearing.
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