On perception of missing fundamental
Takahide Matsuoka, Kenichi Ito · The Journal of the Acoustical Society of America · 2003
The frequency band of one channel of telephone line is from 300 Hz to 3400 Hz. Although the pitch frequency of speech is not in the frequency band, the frequency can be perceived through telephone. So, the psycho acoustic experiments of missing fundamental f0 were carried out at hearing a compound sound of f1 and f2, where f1=nf0, f2=(n+k)f0, n and k: natural numbers. It has been confirmed, by a significant difference test, that the missing fundamental can be heard. Then, it was investigated how the phase difference and amplitude difference between f1 and f2 influence the production of f0. The results are the following. The phase difference does not influence on the perception of f0. The amplitude difference in some range does not influence it. Those mechanisms have been made clear by consideration based on the experimental results using cochlea models. Now, the perception of missing fundamental for higher harmonics is being investigated.