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A 4-week bedtime audio intervention combining binaural beats with pure music reduces perceived stress in college students with poor sleep quality

In a three-group randomized controlled trial of 66 college students with poor sleep quality (PSQI > 7), a 30-minute audio intervention combining binaural beats with pure music at bedtime for 4 weeks (5 nights/week) significantly reduced perceived stress as measured by the PSS, with significant time, group, and time-by-group interaction effects (p < 0.05). The binaural beats + pure music group was more effective at reducing stress than pink noise + pure music or control. However, no significant group differences were found in morning salivary cortisol levels, which showed only a main effect of time.

Last updated: Jul 7, 2026•1 RCTs•📖 Read as article →

Evidence Score

Evidence Score42/100
Human RCT★★☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. The impact of sound intervention on sleep quality and stress levels in college students: a randomized controlled trial.

rct

Hou H, Wang J, Yue X · Frontiers in psychology (2026)

Participants: 66
Duration: 4 weeks intervention, with follow-up at week 6
Intervention: 30-minute audio intervention at bedtime combining binaural beats with pure music, administered for 4 consecutive weeks, 5 nights per week
Outcome: Perceived stress (PSS score), sleep quality (PSQI score), morning salivary cortisol concentration
Effect Size: N/A
Population: 66 college students with poor sleep quality (PSQI score > 7)

Result: In a three-group randomized controlled trial of 66 college students with poor sleep quality (PSQI > 7), a 30-minute audio intervention combining binaural beats with pure music at bedtime for 4 weeks (5 nights/week) significantly reduced perceived stress as measured by the PSS, with significant time, group, and time-by-group interaction effects (p < 0.05). The binaural beats + pure music group was more effective at reducing stress than pink noise + pure music or control. However, no significant group differences were found in morning salivary cortisol levels, which showed only a main effect of time.

PubMed: 42389090DOI: 10.3389/fpsyg.2026.1859138

Mechanism Graph

Audio intervention (binaural beats + pure music) is delivered at bedtime
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Intervention modulates neural activity and reduces arousal
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Perceived stress decreases as measured by PSS scores
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Improved sleep quality and reduced perceived stress without significant change in single-point morning cortisol

Limitations

  • ⚠Cortisol measured at a single daily time point (30 min after awakening) is insufficient to infer short-term modulation of HPA axis activity
  • ⚠Small sample size (n=66) limits generalizability
  • ⚠No blinding of participants to intervention groups

Frequently Asked Questions

What is the difference between pink noise and binaural beats in this study?▼

Both were combined with pure music, but the binaural beats + pure music group was more effective at reducing perceived stress than the pink noise + pure music group.

How long did the intervention last each night?▼

The audio intervention lasted 30 minutes at bedtime.

Did the intervention affect cortisol levels?▼

No significant group differences were found in morning salivary cortisol; only a significant main effect of time was observed.

Who was eligible for this study?▼

College students with poor sleep quality, defined as a PSQI score greater than 7.

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References

  1. 1.Hou H, Wang J, Yue X. "The impact of sound intervention on sleep quality and stress levels in college students: a randomized controlled trial.." Frontiers in psychology, 2026. PMID: 42389090 DOI: 10.3389/fpsyg.2026.1859138
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.