Document Detail


Loudness change in response to dynamic acoustic intensity.
MedLine Citation:
PMID:  20822303     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Three experiments investigate psychological, methodological, and domain-specific characteristics of loudness change in response to sounds that continuously increase in intensity (up-ramps), relative to sounds that decrease (down-ramps). Timbre (vowel, violin), layer (monotone, chord), and duration (1.8 s, 3.6 s) were manipulated in Experiment 1. Participants judged global loudness change between pairs of spectrally identical up-ramps and down-ramps. It was hypothesized that loudness change is overestimated in up-ramps, relative to down-ramps, using simple speech and musical stimuli. The hypothesis was supported and the proportion of up-ramp overestimation increased with stimulus duration. Experiment 2 investigated recency and a bias for end-levels by presenting paired dynamic stimuli with equivalent end-levels and steady-state controls. Experiment 3 used single stimulus presentations, removing artifacts associated with paired stimuli. Perceptual overestimation of loudness change is influenced by (1) intensity region of the dynamic stimulus; (2) differences in stimulus end-level; (3) order in which paired items are presented; and (4) duration of each item. When methodological artifacts are controlled, overestimation of loudness change in response to up-ramps remains. The relative influence of cognitive and sensory mechanisms is discussed.
Authors:
Kirk N Olsen; Catherine J Stevens; Julien Tardieu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of experimental psychology. Human perception and performance     Volume:  36     ISSN:  1939-1277     ISO Abbreviation:  J Exp Psychol Hum Percept Perform     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7502589     Medline TA:  J Exp Psychol Hum Percept Perform     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1631-44     Citation Subset:  IM    
Affiliation:
MARCS Auditory Laboratories, University of Western Sydney, South Penrith, NSW, Australia. k.olsen@uws.edu.au
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