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Ok * Submit * Log in * Register * Log in + Submit + Log in * Subscribe * Claim Access provided by Correspondence| Volume 32, ISSUE 21, PR1222-R1223, November 07, 2022 * PDF [205 KB]PDF [205 KB] * Figures + Figure Viewer + Download Figures (PPT) * Save + Add to Online LibraryPowered ByMendeley + Add to My Reading List + Export Citation + Create Citation Alert * Share Share on + Twitter + Facebook + LinkedIn + Sina Weibo * more + Reprints + Request * Top Undetectable very-low frequency sound increases dancing at a live concert * Daniel J. Cameron Daniel J. Cameron Correspondence Corresponding author Contact Affiliations Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, L8S 4L8, Canada Search for articles by this author * Dobromir Dotov Dobromir Dotov Affiliations Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, L8S 4L8, Canada LIVELab, McMaster University, Hamilton, L8S 4L8, Canada Search for articles by this author * Erica Flaten Erica Flaten Affiliations Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, L8S 4L8, Canada Search for articles by this author * Daniel Bosnyak Daniel Bosnyak Affiliations LIVELab, McMaster University, Hamilton, L8S 4L8, Canada Search for articles by this author * Michael J. Hove Michael J. Hove Affiliations School of Health and Natural Sciences, Fitchburg State University, Fitchburg, MA 01420, USA Search for articles by this author * Laurel J. Trainor Laurel J. Trainor Affiliations Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, L8S 4L8, Canada LIVELab, McMaster University, Hamilton, L8S 4L8, Canada Rotman Research Institute, Toronto, M6A 2E1, Canada Search for articles by this author DOI:https://doi.org/10.1016/j.cub.2022.09.035[CROSSMARK_Color_hori] Undetectable very-low frequency sound increases dancing at a live concert Previous ArticleFrom genes to shape in leaf development and evolution Next ArticleMental object rotation based on two-dimensional visual representations Advertisement Summary Does low frequency sound (bass) make people dance more? Music that makes people want to move tends to have more low frequency sound, and bass instruments typically provide the musical pulse that people dance to ^1 * Stupacher J. * Hove M.J. * Janata P. Audio features underlying perceived groove and sensorimotor synchronization in music. Music Percept. 2016; 33: 571-589 * Crossref * Google Scholar . Low pitches confer advantages in perception and movement timing, and elicit stronger neural responses for timing compared to high pitches ^2 * Lenc T. * Keller P.E. * Varlet M. * Nozaradan S. Neural tracking of the musical beat is enhanced by low-frequency sounds. Proc. Natl. Acad. Sci. USA. 2018; 115: 8221-8226 * Crossref * PubMed * Scopus (42) * Google Scholar , suggesting superior sensorimotor communication. Low frequency sound is processed via vibrotactile ^3 * Hove M.J. * Martinez S.A. * Stupacher J. Feel the bass: Music presented to tactile and auditory modalities increases aesthetic appreciation and body movement. J. Exp. Psychol. Gen. 2020; 149: 1137 * Crossref * PubMed * Scopus (12) * Google Scholar and vestibular ^4 * Todd N.P.M. * Lee C.S. The sensory-motor theory of beat induction 20 years on: A new synthesis. Front. Hum. Neurosci. 2015; 9: 444 * Crossref * PubMed * Scopus (56) * Google Scholar (in addition to auditory) pathways, and stimulation of these non-auditory modalities in the context of music can increase ratings of groove (the pleasurable urge to move to music) ^3 * Hove M.J. * Martinez S.A. * Stupacher J. Feel the bass: Music presented to tactile and auditory modalities increases aesthetic appreciation and body movement. J. Exp. Psychol. Gen. 2020; 149: 1137 * Crossref * PubMed * Scopus (12) * Google Scholar , and modulate musical rhythm perception ^4 * Todd N.P.M. * Lee C.S. The sensory-motor theory of beat induction 20 years on: A new synthesis. Front. Hum. Neurosci. 2015; 9: 444 * Crossref * PubMed * Scopus (56) * Google Scholar . Anecdotal accounts describe intense physical and psychological effects of low frequencies, especially in electronic dance music ^5 * Jasen P.C. Low End Theory: Bass, Bodies and the Materiality of Sonic Experience. Bloomsbury Publishing, New York, NY2016 * Crossref * Google Scholar , possibly reflecting effects on physiological arousal. We do not, however, know if these associations extend to direct causal effects of low frequencies in complex, real-world, social contexts like dancing at concerts, or if low frequencies that are not consciously detectable can affect behaviour. We tested whether non-auditory low-frequency stimulation would increase audience dancing by turning very-low frequency (VLF) speakers on and off during a live electronic music concert and measuring audience members' movements using motion-capture. Movement increased when VLFs were present, and because the VLFs were below or near auditory thresholds (and a subsequent experiment suggested they were undetectable), we believe this represents an unconscious effect on behaviour, possibly via vestibular and/or tactile processing. Main text People attending a performance by the electronic music duo Orphx at the LIVELab were recruited for the study. Participants gave informed consent, were fitted with motion-capture marker headbands, and completed pre- and post-concert questionnaires (see Supplemental information). We turned VLF speakers (8-37 Hz) on and off every 2.5 minutes over 55 minutes of the performance (Figure 1D), calculated head movement speed (the three-dimensional path length per sampling unit of time) for each participant in each of the eighteen segments, and compared average normalized movement while VLFs were ON vs. OFF. Our data show that audience participants moved more, on average by 11.8%, while VLFs were ON vs. OFF (t(42) = 5.32, p < 0.0001; d = 0.81; Figure 1E). Figure 1Audience members at an electronic music performance moved more when very-low frequencies were present vs. absent. Show full caption (A) Orphx performing at the LIVELab. (B) Audience during the concert. (C) Spectral power in concert audio during VLF ON (orange) and OFF (blue). (D) Waveforms of the concert audio (top) and the VLFs (bottom) from the 55-minute period of data collection. (E) Differences in audience participants' normalized movement (VLF ON - OFF) and group mean (black horizontal bar). (F) Participant performance in the VLF detection experiment. * View Large Image * Figure Viewer * Download Hi-res image * Download (PPT) Post-concert questionnaire data indicated that participants felt bodily sensations associated with bass frequencies during the concert, and that these were pleasurable and contributed to the urge to move (all p < 0.001). However, the bodily sensations were not perceived as stronger than at similar concerts (p = 0.49). Together, these results reflect associations between bass, dancing, and pleasure in electronic dance music, consistent with previous reports ^5 * Jasen P.C. Low End Theory: Bass, Bodies and the Materiality of Sonic Experience. Bloomsbury Publishing, New York, NY2016 * Crossref * Google Scholar , but also that the bodily sensations apparent to participants were not elicited by the VLFs (most concerts do not use VLF speakers and participants indicated bodily sensations were similar to other concerts). To confirm that the VLFs were not consciously detectable, 17 new participants (one of whom participated in the concert experiment) completed a two-alternative forced choice task using the same VLF speakers in the LIVELab. On each trial, participants heard two pairs of 3.5 s excerpts from the concert audio and indicated which pair's excerpts were different (all excerpts in the trial were identical except for the presence or absence of VLFs in one excerpt). Participants performed at chance (mean 49.8% correct, SD = 4.56%), and a Bayesian t test on participants' rates of correct responses indicated substantial evidence for the null hypothesis -- that participants could not detect the presence/absence of VLFs (n = 17; prior = Cauchy distribution centred on 0 with width = 0.707; BF[0+] = 4.36; Figure 1F). It should be noted that two experimenters familiar with the VLF manipulation and the purpose of this follow-up experiment participated in it and performed at chance (both 50% correct). Omitting their data has a negligible effect, only reducing the Bayes factor slightly (BF[0+] = 4.12). These results demonstrate that a complex, social behaviour -- dance -- can be increased in intensity by VLFs without participants' awareness. This result exceeds the previously known associations between bass and dance, demonstrating a large and highly reliable effect in a context of maximal ecological validity. Vibrotactile and vestibular systems process low frequency sound, have close links to the motor system, and can affect groove ratings, spontaneous movement, and rhythm perception. Because of these connections, and because VLFs were below or near auditory threshold, these non-auditory sensory pathways were likely involved in the observed effect of VLFs on dancing at a live concert by contributing salient cross-modal cues to the motor system. One theory suggests the vestibular system in particular has a fundamental role in human perception of low frequencies, musical rhythm, and the urge to move to music, in part due to vestibular-autonomic effects ^4 * Todd N.P.M. * Lee C.S. The sensory-motor theory of beat induction 20 years on: A new synthesis. Front. Hum. Neurosci. 2015; 9: 444 * Crossref * PubMed * Scopus (56) * Google Scholar . Our study is consistent with that theory, although it was not a direct test of it. Some VLFs were above the predicted perceptual thresholds, although consciously undetectable. Because VLFs were relatively near thresholds (that were determined in silence) whereas non-VLFs were far above thresholds (see supplemental material), we believe that auditory masking of the VLFs contributed to their being undetectable. The undetectable nature of the VLFs shows that the causal relationship between bass and dancing does not reflect an explicit association -- that is, it is highly unlikely that audience members identified when VLFs were activated and responded by consciously deciding to dance more (despite having a general association of bass, movement, and pleasure). The implicit nature of the response suggests involvement of subcortical pathways from sound to behaviour, possibly including modulation of the reward system, whose activity is associated with groove ^6 * Matthews T.E. * Witek M.A. * Lund T. * Vuust P. * Penhune V.B. The sensation of groove engages motor and reward networks. NeuroImage. 2020; 214116768 * Crossref * PubMed * Scopus (22) * Google Scholar and movement vigor ^7 * Shadmehr R. * Ahmed A.A. Vigor: Neuroeconomics of Movement Control. MIT Press, Cambridge, MA2020 * Crossref * Google Scholar , and/or timing dynamics in the motor system via basal ganglia ^8 * Cannon J.J. * Patel A.D. How beat perception co-opts motor neurophysiology. Trends Cogn. Sci. 2020; 25: 137-150 * Abstract * Full Text * Full Text PDF * PubMed * Scopus (37) * Google Scholar . While culture and individual experience may or may not influence the extent to which VLFs influence dancing and movement, their undetectable nature suggests a relatively low-level pathway by which low frequencies influence movement and dancing, in turn suggesting a fundamental aspect of human music cognition and dance behaviour. Acknowledgements We would like to thank the volunteers and staff at the LIVELab, including Sally Stafford, Susan Marsh-Rollo, and Elaine Whiskin, the volunteer participants, Orphx, and Meyer Sound and Gerr Audio for generously providing the VLF-C speakers. This research was supported by grants to L.J.T. from Social Science and Humanities Research Council of Canada (Insight Grant 435-2020-0442), the Natural Sciences and Engineering Research Council of Canada (Discovery Grant RGPIN-2019-05416), the Canadian Institutes of Health Research (Project Grant MOP 153130), and the Canadian Institute for Advanced Research. Declaration of interests The authors declare no competing interests. Supplemental information * Download .pdf (.52 MB) Help with pdf files Document S1. Supplemental Information, including detailed methods, results, link to data, and two figures References 1. + Stupacher J. + Hove M.J. + Janata P. Audio features underlying perceived groove and sensorimotor synchronization in music. Music Percept. 2016; 33: 571-589 View in Article + Crossref + Google Scholar 2. + Lenc T. + Keller P.E. + Varlet M. + Nozaradan S. Neural tracking of the musical beat is enhanced by low-frequency sounds. Proc. Natl. Acad. Sci. USA. 2018; 115: 8221-8226 View in Article + Scopus (42) + PubMed + Crossref + Google Scholar 3. + Hove M.J. + Martinez S.A. + Stupacher J. Feel the bass: Music presented to tactile and auditory modalities increases aesthetic appreciation and body movement. J. Exp. Psychol. Gen. 2020; 149: 1137 View in Article + Scopus (12) + PubMed + Crossref + Google Scholar 4. + Todd N.P.M. + Lee C.S. The sensory-motor theory of beat induction 20 years on: A new synthesis. Front. Hum. Neurosci. 2015; 9: 444 View in Article + Scopus (56) + PubMed + Crossref + Google Scholar 5. + Jasen P.C. Low End Theory: Bass, Bodies and the Materiality of Sonic Experience. Bloomsbury Publishing, New York, NY2016 View in Article + Crossref + Google Scholar 6. + Matthews T.E. + Witek M.A. + Lund T. + Vuust P. + Penhune V.B. The sensation of groove engages motor and reward networks. NeuroImage. 2020; 214116768 View in Article + Scopus (22) + PubMed + Crossref + Google Scholar 7. + Shadmehr R. + Ahmed A.A. Vigor: Neuroeconomics of Movement Control. MIT Press, Cambridge, MA2020 View in Article + Crossref + Google Scholar 8. + Cannon J.J. + Patel A.D. How beat perception co-opts motor neurophysiology. Trends Cogn. Sci. 2020; 25: 137-150 View in Article + Scopus (37) + PubMed + Abstract + Full Text + Full Text PDF + Google Scholar Article Info Identification DOI: https://doi.org/10.1016/j.cub.2022.09.035 Copyright (c) 2022 Elsevier Inc. 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