Abstract
Apparently the pitch limen for a single, high-frequency sinusoid can be smaller in the presence of a nearby constant frequency component than in isolation. The explanation lies in the time-envelope properties of the two-frequency complex. This reduced DL is considerably larger in cps but smaller in percentage than the DL for a sinusoid of the envelope frequency. This fact is a possible explanation of the results of Flanagan and Saslow who found that the pitch DL of a periodic vowel sound is smaller than the DL of sinusoids at the fundamental frequency.
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