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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
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Updated: Dec 6, 2025

Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception
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Heart Rate Variability Synchronizes When Non-experts Vocalize Together.

Sebastian Ruiz-Blais1, Michele Orini2, Elaine Chew3

  • 1School of Electronic Engineering and Computer Science, Queen Mary University of London, London, United Kingdom.

Frontiers in Physiology
|October 5, 2020
PubMed
Summary
This summary is machine-generated.

Synchronized singing, even for non-experts, can entrain heart rate variability (HRV). This physiological coupling, particularly with sustained vocalizations, suggests potential benefits for music therapy and social connection.

Keywords:
HRVcoherencesingingsynchronizationtogetherness

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Area of Science:

  • Behavioral neuroscience
  • Psychophysiology
  • Music cognition

Background:

  • Singing and chanting are universal human practices, hypothesized to enhance group cohesion.
  • Previous research focused on physiological synchronization (e.g., heart rate variability) in experienced singers.
  • The effects of group vocalization on physiological synchrony in non-experts remain underexplored.

Purpose of the Study:

  • To investigate whether heart rate variability (HRV) synchronizes between pairs of non-expert individuals during vocalization.
  • To compare HRV synchronization during synchronous long vocalizations, short vocalizations, and baseline conditions.

Main Methods:

  • Employed time-frequency coherence (TFC) analysis to assess HRV coupling in dyads.
  • Measured physiological responses during distinct vocalization conditions: long notes (>10s), short notes (<1s), and a no-vocalization baseline.
  • Analyzed the influence of respiration on HRV synchronization and compared vocalization onset frequencies with TFC peaks.

Main Results:

  • Significant HRV synchronization was observed during synchronous long vocalizations compared to short vocalizations and baseline (p < 0.01).
  • A portion of this HRV synchronization persisted even after accounting for respiratory influences, indicating a non-respiratory component (p < 0.05).
  • Vocalization onset frequencies often matched peaks in the TFC spectra, exceeding typical physiological frequency ranges.

Conclusions:

  • Autonomic physiological entrainment occurs in non-expert singing, suggesting a biological basis for the social bonding effects of group vocalization.
  • The findings support the potential application of group singing in music therapy and social prescription programs for the general population.
  • Subjective experiences of 'togetherness' did not directly correlate with the degree of HRV coupling in this study.