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Perceptibility of Phase Changes

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Phase difference limens for steady three-tone-complexes, adequately determined by the amount of the “critical phase difference” |Δ g, reveal a characteristic behaviour: For small frequency seporations between the components, phase differences of 10° … 30° are audible, almost independent of level, frequency region and frequency separations. For large separations between to components the phase difference limens increase, especially depending on level. Several different mechanisms seem to be effective: At small frequency separations phase changes are detected as changes of the time structure of the stimulus (changes of “roughness”). As soon as the spectrum of the three-tonestimulus exceeds one critical band, obviously alternations of the phase relations between the components are recognized because of interactions of the excitation patterns of the partial tones and/or because of interactions of aural distortion products (changes of “pitch” and “timbre”).
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Document Type: Research Article

Publication date: 01 June 1976

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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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