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An Experiment to Determine Whether the Interaural Time Differences Used in Lateralizing Middle and High Frequency Complex Tones is Dependent in Any Way on Fine Structure Information

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Experiments, using sinusoidally amplitude-modulated carriers, have been conducted in which a delayed version of the signal in one ear was played to the other.

For anharmonic signals it was found that a fused central image could be obtained when the delay was approximately equal to the reciprocal of the modulating frequency. The experiments suggest that information enabling the subject to lateralise the sound is taken primarily from the envelope of the signal and not from its fine-structure.

Zusammenfassung

Unter Verwendung sinusformiger, amplitudenmodulierter Träger wurden Experimente durchgeführt, bei denen das Signal des einen Ohres dem anderen Ohr verzögert angeboten wurde.

Für unharmonische Signale konnte festgestellt werden, daß ein gesicherter Mitteneindruck dann beobachtet wurde, wenn die Verzögerung näherungsweise gleich dem Reziproken der Modulationsfrequenz war. Das Experiment läßt vermuten, daß die Information, die die Lateralisation des Schalls ermöglicht, in erster Linie von der Einhüllenden des Signals und nicht von seiner Feinstruktur bezogen wird.

Sommaire

On a effectué des expériences en utilisant des porteuses modulées sinusoïdalement en amplitude et en envoyant dans la seconde oreille une version retardée du signal envoyé dans la première.

Pour des signaux anharmoniques, on a trouvé qu'on pouvait obtenir une image centrale fusionnée lorsque le retard imposé était approximativement égal à l'inverse de la fréquence de modulation. Ces expériences conduisent à penser que l'information qui rend le sujet capable de latéraliser le son est empruntée en premier lieu à l'enveloppe du signal et non à sa structure fine.
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Document Type: Research Article

Publication date: February 1, 1981

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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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