Temporal changes in a complex spectral profile

William Yost, M. J. Moore

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The spectral properties of a complex stimulus (rippled noise) were varied over time, and listeners were asked to discriminate between this stimulus and a flat-spectrum, stationary noise. The spacing between the spectral peaks of rippled noise was changed sinusoidally as a function of time, or the location of the spectral peaks of rippled noise was moved up and down the spectrum as a sinusoidal function of time. In most conditions, listeners were able to make the discriminations up to rates of temporal modulation of 5-10 cycles per second. Beyond 5-10 cps the rippled noise with the temporally varying peaks was indiscriminable from a flat (nonrippled) noise. The results suggest that for temporal changes in the spectral peaks of rippled noise, listeners cannot monitor the output of a single (or small number of) auditory channel(s) (critical bands), or that the mechanism used to extract the perceptual information from these stimuli is slow. Temporal variations in the spectral properties of rippled noise may relate to temporal changes in the repetition pitch of complex sounds, the temporal properties of the coloration added to sound in a reverberant environment, and the nature of spectral peak changes such as those that occur in speech-formant transitions. The results are relevant to the general issue of the auditory system's ability to extract information from a complex spectral profile.

Original languageEnglish (US)
Pages (from-to)1896-1905
Number of pages10
JournalJournal of the Acoustical Society of America
Volume81
Issue number6
DOIs
StatePublished - Jan 1 1987
Externally publishedYes

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profiles
stimuli
acoustics
Spectrality
discrimination
repetition
spacing
color
modulation
cycles
output
Listeners
Stimulus
Hearing
Sound

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

Cite this

Temporal changes in a complex spectral profile. / Yost, William; Moore, M. J.

In: Journal of the Acoustical Society of America, Vol. 81, No. 6, 01.01.1987, p. 1896-1905.

Research output: Contribution to journalArticle

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