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Sound Image Broadening by a Single Reflection Considering Temporal Change of Interaural Cross-Correlation

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In this paper, we study the width of a sound image due to the combination of a leading sound and its delayed one, each coming from different directions. If the loudness of the leading and the delayed sounds are the same, the sound image is localized in the middle between the leading and the delayed sounds. However the sound image is rather spread out in space (broadened). This can, e.g., be experienced in car-stereo listening by the off-center listening position. This study concerns auditory experiments as well as an analytic model of the broadening effect. A pair of noise bursts was used as the leading and the delayed sounds. To express the width of the sound image, the ICC (interaural correlation coefficient) of noise bursts made from two incoherent noises is introduced. The width of the sound image increases as the delay time between the leading and the delayed sounds increases. For delays longer than 10 ms, it reaches subjective diffuseness. The ICC represents this subjective diffuseness caused by the leading and delayed sound better than the TRICC (maximum value of a normalized transient interaural cross-correlation function) or the IACC.
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Document Type: Research Article

Publication date: March 1, 2001

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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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