Theories of Communication Development

Green, Maureen; Cobb, Leslie

doi:10.1007/978-1-4613-9011-4_1

Cited by 1 publication

(1 citation statement)

References 24 publications

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“…The analyses chosen were among those reported by other investigators (e.g., Hartmann and Pumplin, 1988; Green, 1991;Richards, 1992) as being sensitive to changes in either the envelope or fine structure of narrowband sounds, along with certain other measures we felt might also prove useful in this application. As opposed to previous work, however, our intent was to find a measure that could account for the differences in thresholds associated with individual masker waveforms rather than to predict detection performance from the average characteristics of distributions of masker waveforms.…”

Section: In the First Two Experiments The Maskers Were Multitone Commentioning

confidence: 98%

Discriminability of narrow-band sounds in the absence of level cues

Kidd

Uchanski

Mason

et al. 1993

The Journal of the Acoustical Society of America

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Several experiments are described in which the task of the observer was to detect an intensity increment to the center tone of a narrow-band, multitone complex. The sound-pressure levels of the stimuli were equated, then randomized, so that listeners could not detect the signal by using level cues. The primary experimental variables were the number of tones in the masker spectrum, the level of the center tone or "pedestal" relative to the other tones, the center frequency and the sound-pressure level. Both "random-phase" and "fixed-phase" conditions (referring to whether the pattern of starting phases of the nonsignal tones was chosen randomly on every presentation or was held constant throughout each trial and block of trials) were tested. Although no simple detection strategy appeared to account for all of the results, the most plausible explanation for performance in most conditions was that the listeners were able to discriminate between sounds based on subtle differences in the amplitude envelopes of the waveforms.

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Section: In the First Two Experiments The Maskers Were Multitone Commentioning

confidence: 98%