#13. LOW-FREQUENCY SOUND & VIBRATION
How Low-Frequency Sound and Mechanical Vibration
Affect the Human Body
INTRODUCTION
Low-frequency sound and mechanical vibration can produce measurable effects throughout the human body. Research has examined these forms of stimulation in relation to pain, physical function, movement, balance, neurological recovery, physiological responses and rehabilitation.
Clinical studies have investigated low-frequency sound stimulation, vibroacoustic therapy and whole-body vibration in people with chronic pain, stroke, osteoarthritis and other conditions affecting physical function. This research provides human evidence that externally applied sound and mechanical vibration can influence meaningful physical and physiological outcomes.
SCIENTIFIC RESEARCH & PUBLISHED STUDIES
Treatment of Chronic Back Pain Using Indirect Vibroacoustic Therapy: A Pilot Study
A 12-week pilot study involving 23 people with chronic shoulder or low-back pain used low-frequency sound-wave stimulation from 16–160 Hz delivered through the hands and feet. Significant reductions in pain and pain-related disability were observed, along with significant improvement in physical quality of life; 65% achieved at least a 3-point pain reduction.
Effects of Whole-Body Vibration Therapy on Pain, Functionality, Postural Stability, and Proprioception in Patients with Subacute and Chronic Non-Specific Low Back Pain: A Systematic Review
A systematic review of 12 studies involving 821 participants found that whole-body vibration therapy, using frequencies of approximately 5–30 Hz, significantly reduced pain and improved measures of daily function, physical function, proprioception and postural stability in people with subacute and chronic non-specific low-back pain.
Efficacy and Safety of Whole-Body Vibration Therapy for Post-Stroke Spasticity: A Systematic Review and Meta-Analysis
A systematic review and meta-analysis of 11 randomized controlled trials involving 475 patients found that whole-body vibration used as an adjunct to conventional rehabilitation was more effective for reducing upper- and lower-limb spasticity after stroke. Moderate-quality evidence supported the effect, with no serious adverse impacts reported in the included studies.
Efficacy of Vibration Therapy on Physical Function, Activity and Participation in People with Stroke: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
A 2026 systematic review and meta-analysis of 37 randomized controlled trials involving 1,492 people with stroke found significant improvements in motor function, spasticity, balance, gait and activity following vibration therapy. The evidence was rated low to moderate quality, while participation did not significantly improve.
Effects of Whole-Body Vibration Training as an Adjunct to Conventional Rehabilitation Exercise on Pain, Physical Function and Disability in Knee Osteoarthritis: A Systematic Review and Meta-Analysis
A 2025 systematic review and meta-analysis of 16 randomized controlled trials involving 589 participants found that adding whole-body vibration to conventional rehabilitation significantly reduced knee pain and increased knee muscle strength in people with knee osteoarthritis. The analysis also found that higher-frequency vibration produced greater pain reduction than lower-frequency vibration.
Effect of Low Frequency Sound Vibration on Acute Stress Response in University Students—Pilot Randomized Controlled Trial
A double-blind randomized controlled trial involving 54 university students examined low-frequency sound vibration combined with music and found significant between-group effects in measures of heart-rate variability. The findings provide preliminary evidence that low-frequency sound vibration can influence physiological measures associated with the acute stress response.
The Effects of Whole-Body Vibration on Spasticity in Stroke: A Systematic Review and Meta-Analysis
A 2025 systematic review and meta-analysis of 13 randomized controlled trials found that vibration therapy significantly reduced spasticity in people with stroke. Importantly for this topic, the analysis found that vibration frequency was a significant moderator of treatment effects, with the greatest effects observed using low-frequency stimulation below 20 Hz.