Abstract
Frequency distribution of two-tone suppression was studied in forward masking and a comparison of psychological and physiological results were examined. The present majority of our data on psychological suppression agreed very well in most qualitative aspects with suppression in single auditory-nerve fibers. It was found that suppression magnitude was not result of the frequency difference between F2 and F1. Also, it was found that suppression kept monotonical growth with increasing masker intensity. The most striking feature of our data was that large suppression magnitude occured even though suppressor intensity was weak in values of 10-20dB. These results support the idea that suppression is generated primarily as a result of bidirectional transduction occuring within hair cells and stereociliary-tectorial structures.
