Investigation on Missing Fundamental by a Cochlea Model Generating Spontaneous Discharge.

摘要

It is considered that the pitch(f(sub 0)) is produced in auditory centers when we hear a complex tone of f(sub 1) = n f(sub 0), and = f (sub 2) (n+1) f(sub 0). f(sub 0) is known as missing fundamental. By a cochlea model we try to make clear the mechanism how missing fundamental is generated. The following signal is applied to the cochlea model. a(sub 1)sin(2 delta f(sub l)) + a(sub 2)sin(2 delta f(sub 2 t)). We make an aggregated autocorreleogram of output pulse trains from a cochlea model. We investigate methodically the relation between the information of missing fundamental in the output pulse trains and the values a(sub 1) and n, k in f(sub 1) = n f(sub 0), = (n+k) f(sub 0) by the aggregated autocorreleogram.