| The detectability of a tone added to narrow bands of equal-energy noise. | |
| | |
MedLine Citation:
|
PMID: 1619118 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The ability to detect a 2000-Hz tone added to bands of noise centered at 2000 Hz was measured using a two-interval, forced-choice, pulsed-masker paradigm. The stimuli ranged in duration from 50-200 ms, and the maskers ranged in bandwidth from 5-320 Hz. In one condition, the bands of noise had equal energy across the two intervals of each trial and in a second condition the levels of the stimuli were independently and randomly chosen from a 30-dB range on a presentation-by-presentation basis. The energy model failed to predict the data obtained either in the presence or in the absence of level variation. Control experiments showed that exposure to level variation yielded an overall reduction in sensitivity, suggesting that the presence of level variation leads to changes in the listeners' detection strategies. Computer simulations indicated that changes in either the fine structure or envelopes of the waveforms were sufficient to account for detection when changes in stimulus energy were not reliable. |
| | |
Authors:
|
V M Richards |
Related Documents
:
|
18729078 - Functional decoupling of bold and gamma-band amplitudes in human primary visual cortex. 11538228 - Laboratory studies of the infrared spectral properties of co in astrophysical ices. 10491708 - Speech recognition with altered spectral distribution of envelope cues. 1556308 - The detection of temporal gaps as a function of frequency region and absolute noise ban... 16476648 - Driver contrast sensitivity and reaction times as measured through a salt-covered winds... 15031088 - Motion repulsion is monocular. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
|
Title: The Journal of the Acoustical Society of America Volume: 91 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 1992 Jun |
Date Detail:
|
Created Date: 1992-08-04 Completed Date: 1992-08-04 Revised Date: 2006-12-27 |
Medline Journal Info:
|
Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 3424-35 Citation Subset: IM |
Affiliation:
|
Department of Psychology, University of Pennsylvania, Philadelphia 19104-6196. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Attention* Auditory Threshold Computer Simulation Humans Noise* Perceptual Masking* Pitch Discrimination* Psychoacoustics Sound Spectrography |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Evaluation of a method of simulating reduced frequency selectivity.
Next Document: The role of envelope fluctuations in an apparent demonstration of suppression in simultaneous maskin...