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Auditory Search Asymmetry Between Pure Tone and Temporal Fluctuating Sounds Distributed on the Frontal-Horizontal Plane

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Search asymmetry is useful for consideration of the primary features of the human cognitive system and has been intensively investigated in the visual domain. In this paper, search asymmetry in the auditory domain was examined for sound sources spatially distributed in the frontal-horizontal plane. The results clearly showed the existence of search asymmetry between pure tones and temporal fluctuating sounds such as narrow band noises, AM tones and FM tones. The reaction time required to detect a temporal fluctuating sound among distracting pure tones was less dependent on the number of components than the reaction time required to detect a pure tone among distracting temporally fluctuating sounds. These results suggest that the human auditory system utilizes temporal changes in amplitude and frequency of sound as a basic feature for the detection of target sounds in the presence of other sounds.
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Document Type: Research Article

Publication date: March 1, 2003

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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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