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Archives of Acoustics

The Journal of Institute of Fundamental Technological of Polish Academy of Sciences

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Volume 38, Issue 4

Issues

Effect of Binaural Stimulation on Attention and EEG

Adela Crespo
  • Corresponding author
  • Centro de Acustica Aplicada y Evaluacion no Destructiva, Consejo Superior de Investigaciones Cient´ıficas (CAEND-CSIC) C/ Serrano 144, 28005 – Madrid, Spain
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  • Other articles by this author:
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/ Manuel Recuero
  • Corresponding author
  • Centro de Acustica Aplicada y Evaluacion no Destructiva, Consejo Superior de Investigaciones Cient´ıficas (CAEND-CSIC) C/ Serrano 144, 28005 – Madrid, Spain
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/ Gerardo Galvez
  • Corresponding author
  • Centro de Tecnologıa Biomedica, Universidad Politecnica de Madrid (CTB-UPM) Campus de Montegancedo, 28223 – Pozuelo de Alarcon, Spain
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  • Other articles by this author:
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/ Adrián Begoña
  • Corresponding author
  • Centro de Acustica Aplicada y Evaluacion no Destructiva, Consejo Superior de Investigaciones Cient´ıficas (CAEND-CSIC) C/ Serrano 144, 28005 – Madrid, Spain
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2013-12-31 | DOI: https://doi.org/10.2478/aoa-2013-0061

Abstract

When two pure tones of slightly different frequency are presented separately to each ear, the listener perceives a third single tone with amplitude variations at a frequency that equals the difference between the two tones; this perceptual illusion is known as the binaural auditory beat (BB). There are anecdotal reports that suggest that the binaural beat can entrain EEG activity and may affect the arousal levels, although few studies have been published. There is a need for double-blind, well-designed studies in order to establish a solid foundation for these sounds, as most of the documented benefits come from self-reported cases that could be affected by placebo effect. As BBs are a cheap technology (it even exists a free open source programmable binaural- beat generator on the Internet named Gnaural), any achievement in this area could be of public interest. The aim in our research was to explore the potential of BBs in a particular field: tasks that require focus and concentration. In order to detect changes in the brain waves that could relate to any particular improvement, EEG recordings of a small sample of individuals were also obtained. In this study we compare the effect of different binaural stimulation in 7 EEG frequency ranges. 78 participants were exposed to 20-min binaural beat stimulation. The effects were obtained both quali- tative with cognitive test and quantitative with EEG analysis. Results suggest no significant statistical improvement in 20-min stimulation.

Keywords : binaural auditory beats; attention; frequency following response

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About the article

Published Online: 2013-12-31

Published in Print: 2013-12-01


Citation Information: Archives of Acoustics, Volume 38, Issue 4, Pages 517–528, ISSN (Online) 2300-262X, DOI: https://doi.org/10.2478/aoa-2013-0061.

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