Document Detail


Temporal dynamics of pitch strength in regular-interval noises: effect of listening region and an auditory model.
MedLine Citation:
PMID:  10875379     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Recently, it was demonstrated that the pitch strength of a stimulus denoted "AABB" differed from rippled noise (RN) despite the fact that their long-term spectra and autocorrelation functions are identical (Wiegrebe et al., 1998). Rippled noise is generated by adding a delayed copy of Gaussian noise back to itself; AABB is generated by concatenating equal-duration, Gaussian-noise segments where every segment is repeated once. It was shown that a simple model based on a two-stage integration process separated by a nonlinear transformation explains the pitch-strength differences quantitatively. Here, we investigate how the spectral listening region influences pitch-strength differences between RN and AABB. Bandpass filtering the two stimuli with a constant bandwidth of 1 kHz revealed a systematic effect of center frequency. For relatively high pitches (corresponding to delays, d, of 4 or 5.6 ms, pitch strength differences between AABB and RN were absent when the pass band was between 0 and 1 kHz. When the pass band was between 3.5 and 4.5 kHz, pitch-strength differences were substantial. For lower pitches (d equal to or longer than 8 ms), AABB had a substantially greater pitch strength independent of the filter center frequency. The model presented in Wiegrebe et al. (1998) cannot capture these effects of center frequency. Here, it is demonstrated that it is possible to simulate the RN-AABB pitch-strength differences, and the effect of listening region, with a computer model of the auditory periphery. It is shown that, in an auditory model, pitch-strength differences are introduced by the nonlinear transformation possibly associated with half-wave rectification or mechanoelectrical transduction. In this experimental context, however, the nonlinearity has perceptual relevance only when the differences in short-term fluctuations of AABB and RN are preserved in auditory-filter outputs. The current experiments relate the purely functional model introduced in the preceding paper to basic properties of the peripheral auditory system. The implication for neural time constants of pitch processing is discussed.
Authors:
L Wiegrebe; H S Hirsch; R D Patterson; H Fastl
Related Documents :
2061219 - Rapid development of a sensory attribute in young chickens.
10875379 - Temporal dynamics of pitch strength in regular-interval noises: effect of listening reg...
10462799 - The role of spectral and periodicity cues in auditory stream segregation, measured usin...
7441189 - Conditional gradient displacements: the effects of conditional discrimination training ...
20969289 - On the perception of tones in fuzhou.
11729329 - Latency of auditory evoked field deflection n100m ruled by pitch or spectrum?
9320019 - The direction of celestial rotation influences the development of stellar orientation i...
22906989 - Adaptation of surround inhibition in the human motor system.
23161909 - Phycoerythrin-specific bilin lyase-isomerase controls blue-green chromatic acclimation ...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  107     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2000 Jun 
Date Detail:
Created Date:  2000-08-15     Completed Date:  2000-08-15     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:  3343-50     Citation Subset:  IM    
Affiliation:
Zoologisches Institut der Universität München, Germany. wiegrebe@zi.biologie.uni-muenchen.de
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Auditory Perception / physiology*
Auditory Threshold / physiology
Cochlea / physiology
Humans
Models, Anatomic*
Noise*
Periodicity
Pitch Perception / physiology*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Efficient across-frequency integration: evidence from psychometric functions.
Next Document:  Relative loudness perception of low and high frequency sounds in the open and occluded ear.