Abstract
The effects of interaction of low‐frequency tone complexes and high‐frequency tone complexes on the thresholds of discrimination (DLs) for a change in periodicity pitch in one of the two frequency regions were studied. Stimuli were digitally constructed by summing sine waves spaced at 100‐ or 200‐Hz intervals. The amplitude of components of one of the interacting complexes was fixed while the periodicity pitch of the other complex was obtained by decrementing amplitude of components in 1‐dB steps. DLs were obtained for (1) low‐frequency complexes only, (2) high‐frequency complexes only, (3) low‐frequency complexes in the presence of high‐frequency complexes, and (4) high‐frequency complexes in the presence of low‐frequency complexes. Preliminary results indicate elevated DLs for high‐frequency complexes in condition 2 and elevated DLs (significant interference effects) in conditions 3 and 4. Interference effects were greater for condition 4 relative to condition 3. Implications in terms of temporal fine structure and envelope cues are discussed.
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