Spectral and temporal weights in spectral-shape discrimination

Huanping Dai, B. G. Berg

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The COSS analysis [B. G. Berg, J. Acoust. Soc. Am. 86, 1743-1746 (1989)] was used to estimate spectral and temporal weights of a three-component, amplitude-modulated stimulus in a spectral-shape discrimination task. In all experiments, the task of the observer was to detect an increment in the level of the center component. A spectral-temporal weight quantifies the relative influence of a spectral component on the decisions of an observer during a specified segment of the total stimulus duration. In the first two experiments, the signal was added to all three temporal segments of the center component. The ideal weights for each component should be the same across temporal segments. Spectral-temporal weights were obtained for four conditions with different stimulus durations. In general, the estimated weights for each component were not equal at different temporal segments. In the third experiment, the signal was added to only one of three segments of the center component. Ideally, weight patterns should have changed when the temporal position of the signal segment was altered. Two stimulus durations, 300 and 15 ms, were used. For the 300-ms condition, the signal was added to only the end segment, and for all three observers the weight patterns are different from that obtained in experiment 1 with the signal added to all segments. For the 15-ms conditions, altering the signal position changed the estimated weights for only one observer.

Original languageEnglish (US)
Pages (from-to)1346-1355
Number of pages10
JournalJournal of the Acoustical Society of America
Volume92
Issue number3
DOIs
StatePublished - 1992
Externally publishedYes

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discrimination
stimuli
Spectrality
Discrimination
Observer
Experiment
estimates
Stimulus Duration

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Spectral and temporal weights in spectral-shape discrimination. / Dai, Huanping; Berg, B. G.

In: Journal of the Acoustical Society of America, Vol. 92, No. 3, 1992, p. 1346-1355.

Research output: Contribution to journalArticle

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