ABSTRACT
Real-time interaction between speech perception and production is quantitatively revealed by a new measurement technique called TAF (Transformed Auditory Feedback) for voice pitch control. Experimental results suggest that there are two major auditory processes which control voice pitch and that they work in parallel to produce a pitch control signal. One response has a relatively fast (4 Hz to 7 Hz, typically) natural frequency and a delay of 90 ms to 120 ms depending on the pitch. The other response has a relatively slow (0.5 Hz to 1 Hz, typically) natural frequency and a maximum effect around 300 ms to 600 ms. They are both compensatory responses. Implications for the information processing architecture of speech communication mechanisms and the biological basis will also be discussed.
