musique contemporaine

Ircam - articles scientifiques notice originale

Perceptual organization of complex auditory sequences : Effect of number of simultaneous sub-sequences and frequency separation

Type

text
 

Genre(s)

article
 

Forme(s)

document imprimé
 

Cette ressource est disponible chez l'organisme suivant : Ircam - Centre Pompidou

Identification

Titre

Perceptual organization of complex auditory sequences
 

Sous-Titre

Effect of number of simultaneous sub-sequences and frequency separation
 

Nom(s)

Brochard, Renaud (auteur)
 
Drake, Carolyn (auteur)
 
Botte, Marie-Claire (auteur)
 
McAdams, Stephen (auteur)
 

Publication

1999
 

Description

Sujet(s)

auditory streams   critical band   attention
 

Résumé

How do listeners perceptually organize complex auditory sequences composed of two or more simultaneous sub -sequences? We demonstrate that previous results obtained with two-sub-sequence mixtures generalize to more comple x ones, and describe four new organizing principles. A new paradigm identified whether listeners perceive the mixt ure as a single unit (integrative listening) or segregate it into two (or more) perceptual units (stream segregati on). Listeners heard two complex sequences, each composed of 1, 2, 3, or 4 isochronous sub-sequences (each define d by a specific frequency/tempo combination). Their task was to say whether a small temporal irregularity created in one of the sub-sequences was situated in the first or second complex sequence. Attention was focused on one par ticular sub-sequence by preceding the complex sequences by a single sub-sequence. Two control experiments confirm ed that detection was similar in all sub-sequences and was not possible if listeners did not perceptually organize the complex sequences into streams. Then, Experiment 1 showed that the smallest frequency separation under which listeners were able to focus on one sub-sequence was unaffected by the number of co-occurring sub-sequences, sugge sting that the non-focused sounds were not perceptually organized into streams. Experiment 2 showed that temporal detection improved progressively (not abruptly as has been assumed previously) as the frequency separation between the sub-sequences was increased from .25 to 6 auditory filters. Finally, we propose a model of the perceptual org anization of complex auditory sequences.
 

Note(s)

Article paru dans : Journal of Experimental Psychology: Human Perception and Performance vol. 25
 

Localisation

Envoyer la notice

Bookmark and Share 
 

Identifiant OAI

 

Date de la notice

2006-03-14 01:00:00
 

Identifiant portail

 

Contact