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Experiments on the Competition Between a Cue for Separation of Concurrent Sound Sources and Frequency Modulation Expériences sur la mise en concurrence d'un indice de séparation de sources sonores simultanées avec la modulation de fréquence

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The experiments presented here placed frequency modulation in competition with a cue for the segregation of simultaneous sound sources. The value of the segregation parameter was varied in order to find the subject's threshold for perception of two sources. The segregation cue was polyperiodicity. The parameter creating this segregation was the difference in fundamental frequency in the first experiment and the inharmonicity created by stretching the spectrum in the second experiment. Frequency modulation was observed to have an influence on polyperiodicity: the larger the vibrato width, the greater the fundamental frequency difference or spectral stetching needed to obtain the perception of two sound sources.

Les expériences présentées ici visent à mettre en concurrence un indice de séparation de sources sonores simultanées avec la modulation de fréquence. La valeur du paramètre de séparation est variée afin de trouver, pour chaque sujet, le seuil de perception de deux sources. L'indice de séparation est la polypériodicité. Dans la première expérience, le paramètre occasionnant cette séparation est la différence de fréquence fondamentale; dans la deuxième, c'est l'inharmonicité créée par l'étirement du spectre. On a constaté que la modulation de fréquence a une influence sur l'indice de polypériodicité. Plus le vibrato est large, plus la différence de fréquence fondamentale ou l'étirement nécessaire pour obtenir la perception de deux sons doivent être importants.
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Language: French

Document Type: Research Article

Publication date: 1999-07-01

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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