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. Author manuscript; available in PMC: 2013 May 8.
Published in final edited form as: J Acoust Soc Am. 2008 Mar;123(3):1513–1521. doi: 10.1121/1.2828064

FIG. 2.

FIG. 2

Experimental protocol, frequency scale is logarithmic. Frequencies f1 and f2. Frequency ratio R1 equals f2/f1. The frequency f0 is equal to 17 kHz, close to the BF of the observation location. Panel A, istage=1: The higher frequency f2 is equal to f0/R1, the lower frequency f1 is equal to f0/R12. Panel B, istage=2: Both frequencies are reduced by the factor R1. Panel C, istage=3: Both frequencies are again reduced by the factor R1. For each value of R1 nine of such conditions are used in the experiments.