Abstract
Zusammenfassung. Binaurale Stimulationen sind akustisch erzeugte Schwebungen, die im Hirnwellenspektrum liegen und daher als Möglichkeit diskutiert werden, neurophysiologische Entspannungszustände zu induzieren. Die Qualität und Aussagekraft bisheriger Studien ist wissenschaftlich jedoch stark umstritten. In der vorliegenden Arbeit ist daher der Effekt einer binauralen Alpha-Stimulation auf subjektive und physiologische Entspannungs-Parameter untersucht worden. Hierzu wurden 102 Probanden zufällig drei Gruppen zugewiesen: (1) Audio-Beschallung mit binauraler Stimulation, (2) Audio-Beschallung ohne binaurale Stimulation, (3) keine akustische Beschallung. Die subjektive Entspannung wurde vor und nach einer 20-minütigen Stimulation erfasst, die physiologische Entspannungsreaktion über Herzrate, Atemfrequenz und ausgewählte Parameter der Herzratenvariabilität während der Intervention erhoben. Die Ergebnisse zeigen keine spezifische Zunahme an subjektiver oder physiologischer Entspannung. Der aktuelle Forschungsstand zur binauralen Stimulation wird im Lichte dieses Ergebnisses diskutiert.
Abstract. Binaural beats are acoustically generated frequencies that match the frequency bands of brain waves and are therefore considered a means to inducing neurophysiological relaxation. There is, however, large dispute on the scientific quality and validity of extant research on binaural beats. Thus, the effect of a binaural 10Hz (Alpha) stimulation on subjective and physiological parameters of relaxation was analysed. A total of 102 participants were randomly assigned to one of three conditions: (1) audio exposure with binaural beats, (2) audio exposure without binaural beats, (3) no sound exposure. Subjective relaxation was measured before and after the sessions. Heart rate, respiration rate, and different measures of heart rate variability were measured as physiological parameters throughout the sessions. Results did not show a specific increase in subjective or physiological relaxation due to the binaural beats treatment. The state of the art of binaural beats research is discussed in light of these findings.
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