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Phase Relations in an Internal Representation of Two-Tone Octave Complexes

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When two pure tones with a frequency ratio of 1:2 are presented simultaneously to the ear, the loudness and the pitch of the higher-frequency component can vary with the phase relation between the two pure tones.

The pulsation threshold method has been used to study how the internal representation of these octave complexes is influenced by the phase relation. It appears that the pulsation threshold is phase-dependent in a certain test-tone frequency range, the phase at which it is maximum varying systematically with test-tone frequency. This phase-frequency relation has implications for the above-mentioned pitch-phase relation and for the question of the role of the waveform in the generation of the phase effects.


Wenn dem Ohr zwei reine Töne mit einem Frequenzverhältnis von 1:2 gleichzeitig dargeboten werden, können sich Lautstärke und Tonhöhe der höherfrequenten Komponente mit der Phasenbeziehung zwischen den beiden Tönen ändern.

Um festzustellen, in welcher Weise die interne Darstellung dieser Oktavkomplexe durch die Phasenbeziehung beeinflußt wird, wurde das Pulsationsschwellenverfahren angewandt. Es zeigte sich, daß die Pulsationsschwelle in einem bestimmten Testton-Frequenzbereich phasenabhängig ist, wobei die Phase, bei der die Schwelle maximal ist, sich systematisch mit der Testtonfrequenz ändert. Diese Beziehung zwischen Phasenlage und Frequenz hat Implikationen für die oben erwähnte Beziehung zwischen Tonhöhe und Phasenlage und für die Frage nach der Rolle der Wellenform bei der Erzeugung der Phaseneffekte.


Lorsque deux sons purs avec un rapport de fréquences de 1:2 sont présentés simultanément à l'oreille, la sonie et la hauteur de la composante de fréquence supérieure peuvent varier en fonction de la relation de phase entre les deux sons. On a utilisé la méthode du seuil de pulsation pour étudier l'influence de cette relation de phase sur la représentation interne des complexes de deux sons à l'octave. Il a été vérifié que le seuil de pulsation dépend de la phase lorsque le son de test se trouve situé dans une certaine bande de fréquence et que la phase pour laquelle le seuil est maximum varie systématiquement avec la fréquence du son de test. Cette relation phase-fréquence comporte des implications pour la relation hauteur-phase mentionnée plus haut et pour la question du rôle de la forme des ondes dans la production des effets de phase.
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Document Type: Research Article

Publication date: July 1, 1979

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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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