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Fig. 7. Performance varies with sound frequency (2–5 kHz) and which speaker
played the sound stimulus. (A) Average percentage of trials in which subjects
392, 000 and 325 were able to fly to the correct response perch when tested
using a 9° or 10° speaker separation angle. (B–E) Performance
levels observed for each subject as a function of sound frequency (392 at
10°; 000 at 9°; 325 at 10°; and 404 at 20°;
N>100). Dashed lines indicate performance levels observed across
trials in which subjects were played noise stimuli (2–5 kHz,
N>200) mixed in with tones. Arrows in B–D point to sound
frequencies for which subjects did not reach a 65% correct performance level,
regardless of which speaker played the sound stimulus.
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