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Comparison of Perceptual and Motor Responses to Changes in Intensity and Voice Fundamental Frequency

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There are two separate visual systems in the human brain -vision for perception and vision for action. The aim of this paper is to answer the question of whether perception-motor dissociation can also be found in auditory information processing. Previous studies have shown that in the case of changes of fundamental frequency and sound pressure level in auditory feedback during vocalization, compensating motor reactions can be observed. The goal of the present experiments was to establish the just noticeable differences in perception for both the voice fundamental frequency and sound pressure level. The established perception threshold values were used to determine if motor reactions observed in previous experiments might have occurred for stimuli that were perceptually unnoticed as judged by the present study. The results of both experiments showed that the values for which motor responses were observed are lower than the perceptual thresholds. These findings provide evidence supporting the theory of there being two systems for auditory information processing: the motor system, which uses the acoustic signals of self-generated sounds to automatically adjust the acoustic parameters of the voice, and the perception system that consciously perceives changes in frequency and sound pressure level.
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Document Type: Research Article

Publication date: May 1, 2013

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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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