Efficacy of binaural auditory beats in cognition, anxiety, and pain perception: a meta-analysis
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Binaural auditory beats are a perceptual phenomenon that occurs when presenting separately to each ear two tones that slightly differ in their frequency. It has been suggested that binaural beats can influence cognition and mental states among others. The objective of this meta-analysis was to study the effect of binaural beats on memory, attention, anxiety, and analgesia. Twenty-two studies met our inclusion criteria for this meta-analysis. The results, based on 35 effect sizes, showed an overall medium, significant, consistent effect size (g = 0.45). Meta-regression results indicated that it does not seem to be necessary to mask binaural beats with white noise or pink noise in terms of effectiveness, obtaining similar effects with unmasked binaural beats. Moreover, the findings suggest that binaural-beat exposure before, and before and during the task produces superior results than exposure during the task. Time under exposure contributed significantly to the model indicating that longer periods are advisable to ensure maximum effectiveness. Our meta-analysis adds to the growing evidence that binaural-beat exposure is an effective way to affect cognition over and above reducing anxiety levels and the perception of pain without prior training, and that the direction and the magnitude of the effect depends upon the frequency used, time under exposure, and the moment in which the exposure takes place.
Compliance with ethical standards
Conflict of interest
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Ethical approval was not needed for this meta-analysis.
Informed consent was not required for this meta-analysis.
- References preceded by an asterisk indicate studies included in the meta-analysis.Google Scholar
- Botella, B. A., & Meca, J. S. (2015). Meta-análisis en ciencias sociales y de la salud. Madrid: Síntesis.Google Scholar
- Cook, R., & Weisberg, S. (1982). Residuals and influence in regression. London: Chapman & Hall.Google Scholar
- *Garcia-Argibay, M., Santed, M. A., & Reales, J. M. (2017). Binaural auditory beats affect long-term memory. Psychological Research. https://doi.org/10.1007/s00426-017-0959-2 (Advance online publication)
- Hedges, L. V., & Olkin, L. (1985). Statistical methods for meta-analysis. New York: Academic Press.Google Scholar
- Huang, T. L., & Charyton, C. (2008). A comprehensive review of the psychological effects of brainwave entrainment. Alternative Therapies in Health and Medicine, 14(5), 38–50.Google Scholar
- *Isik, B., Esen, A., Büyükerkmen, B., Kilinç, A., & Menziletoglu, D. (2017). Effectiveness of binaural beats in reducing preoperative dental anxiety. British Journal of Oral and Maxillofacial Surgery. https://doi.org/10.1016/j.bjoms.2017.02.014
- *Kennel, S., Taylor, A. G., Lyon, D., & Bourguignon, C. (2010). Pilot feasibility study of binaural auditory beats for reducing symptoms of inattention in children and adolescents with attention-deficit/hyperactivity disorder. Journal of Pediatric Nursing, 25(1), 3–11. https://doi.org/10.1016/j.pedn.2008.06.010.CrossRefGoogle Scholar
- *Kennerly, R. C. (1994). An empirical investigation into the effect of beta frequency binaural beat audio signals on four measures of human memory (MSc thesis). West Georgia College.Google Scholar
- *Kliempt, P., Ruta, D., Ogston, S., Landeck, A., & Martay, K. (1999). Hemispheric-synchronisation during anaesthesia: a double-blind randomised trial using audiotapes for intra-operative nociception control. Anaesthesia, 54(8), 769–773. https://doi.org/10.1046/j.1365-2044.1999.00958.x.CrossRefGoogle Scholar
- Le Scouarnec, R. P., Poirier, R. M., Owens, J. E., Gauthier, J., Taylor, A. G., & Foresman, P. A. (2001). Use of binaural beat tapes for treatment of anxiety: A pilot study of tape preference and outcomes. Alternative Therapies in Health and Medicine, 7(1), 58–63.Google Scholar
- *Lewis, A. K., Osborn, I. P., & Roth, R. (2004). The Effect of hemispheric synchronization on intraoperative analgesia. Anesthesia & Analgesia. https://doi.org/10.1213/01.ANE.0000096181.89116.D2
- London, J. (2004). Hearing in time: Psychological aspects of musical meter. London: Oxford University Press. https://doi.org/10.1093/acprof:oso/9780195160819.001.0001.CrossRefGoogle Scholar
- *McConnell, P. A., Froeliger, B., Garland, E. L., Ives, J. C., & Sforzo, G. A. (2014). Auditory driving of the autonomic nervous system: Listening to theta-frequency binaural beats post-exercise increases parasympathetic activation and sympathetic withdrawal. Frontiers in Psychology, 5, 1248. https://doi.org/10.3389/fpsyg.2014.01248.CrossRefGoogle Scholar
- Moore, B. C. J. (2012). An introduction to the psychology of hearing (6th ed.). London: Brill.Google Scholar
- *Ortiz, T., Martínez, A. M., Fernández, A., Maestu, F., Campo, P., Hornero, R., & Poch, J. (2008). Impact of auditory stimulation at a frequency of 5 Hz in verbal memory. Actas Espanolas de Psiquiatria, 36(6), 307–313.Google Scholar
- O’brien, R. M. (2007). A caution regarding rules of thumb for variance inflation factors. Quality & Quantity, 41(5), 673–690. https://doi.org/10.1007/s11135-006-9018-6.
- *Padmanabhan, R., Hildreth, A. J., & Laws, D. (2005). A prospective, randomised, controlled study examining binaural beat audio and pre-operative anxiety in patients undergoing general anaesthesia for day case surgery. Anaesthesia, 60(9), 874–877. https://doi.org/10.1111/j.1365-2044.2005.04287.x.CrossRefGoogle Scholar
- Peters, J. L., Sutton, A. J., Jones, D. R., Abrams, K. R., & Rushton, L. (2008). Contour-enhanced meta-analysis funnel plots help distinguish publication bias from other causes of asymmetry. Journal of Clinical Epidemiology, 61(10), 991–996. https://doi.org/10.1016/j.jclinepi.2007.11.010.CrossRefGoogle Scholar
- R Core Team. (2017). R: A Language and Environment for Statistical Computing. Vienna, Austria: R Foundation for Statistical Computing. Retrieved from https://www.r-project.org/
- Rosenberg, M. S. (2005). The file-drawer problem revisited: A general weighted method for calculating fail-safe numbers in meta-analysis. Evolution, 59(2), 464–468. https://doi.org/10.1111/j.0014-3820.2005.tb01004.x.CrossRefGoogle Scholar
- Rosenthal, R. (1994). Parametric measures of effect size. In H. Cooper & L. V. Hedges (Eds.), The handbook of research synthesis (pp. 231–244). New York: Russell Sage Foundation.Google Scholar
- Simonsohn, U., Simmons, J. P., & Nelson, L. D. (2015). Better P-curves: Making P-curve analysis more robust to errors, fraud, and ambitious P-hacking, a Reply to Ulrich and Miller (2015). Journal of Experimental Psychology: General, 144(6), 1146–1152. https://doi.org/10.1037/xge0000104.CrossRefGoogle Scholar
- Smith, S. L. (1968). Extraversion and sensory threshold. Psychophysiology, 5(3), 293–299. https://doi.org/10.1111/j.1469-8986.1968.tb02825.x.CrossRefGoogle Scholar
- Swann, R., Bosanko, S., Cohen, R., Midgley, R., & Seed, K. M. (1982). The brain—A user’s manual (p. 92). New York: GP Putnam’s Sons.Google Scholar
- Thompson, S. G., & Sharp, S. J. (1999). Explaining heterogeneity in meta-analysis: a comparison of methods. Statistics in Medicine, 18(20), 2693–2708. https://doi.org/10.1002/(SICI)1097-0258(19991030)18:20%3c2693::AID-SIM235%3e3.0.CO;2-V.CrossRefGoogle Scholar
- *Wahbeh, H., Calabrese, C., Zwickey, H., & Zajdel, D. (2007b). Binaural beat technology in humans: A pilot study to assess neuropsychologic, physiologic, and electroencephalographic effects. The Journal of Alternative and Complementary Medicine, 13(2), 199–206. https://doi.org/10.1089/acm.2006.6201.CrossRefGoogle Scholar
- Weiland, T. J., Jelinek, G. A., Macarow, K. E., Samartzis, P., Brown, D. M., Grierson, E. M., et al. (2011). Original sound compositions reduce anxiety in emergency department patients: a randomised controlled trial. The Medical Journal of Australia, 195(11), 694–698. https://doi.org/10.5694/mja10.10662.CrossRefGoogle Scholar
- Zampi, D. D. (2016). Efficacy of theta binaural beats for the treatment of chronic pain. Alternative Therapies in Health and Medicine, 22(1), 32–38.Google Scholar