A 100 Hz Frequency to Relieve Motion Sickness: A Japanese Breakthrough
In March 2025, a team of researchers from Nagoya University, led by Professors Takumi Kagawa and Masashi Kato, published a study in the journal Environmental Health and Preventive Medicine revealing that a one-minute exposure to a pure 100 Hz tone can alleviate symptoms of motion sickness.
An Innovative Sound-Based Approach
The study showed that exposure to a pure 100 Hz tone at a sound level of 80 to 85 dBZ (equivalent to 60.9–65.9 dBA) before a motion simulation significantly reduced symptoms such as nausea and dizziness. This specific frequency appears to stimulate the vestibular system in the inner ear, thereby improving balance and reducing the autonomic dysregulation associated with motion sickness.
Promising Results
The tests demonstrated that this sound exposure improves posturography measurements and heart rate variability (HRV) metrics, indicating a reduction in sympathetic nervous system activity. In addition, participants reported fewer subjective symptoms as measured by the MSAQ questionnaire. These beneficial effects were observed even after exposures as short as one minute.
Toward Practical Application
The researchers are considering the development of devices incorporating this sound stimulation, such as vehicle seat headrests, to prevent motion sickness. This non-invasive approach, with no apparent side effects, could offer an alternative to traditional medication-based treatments.
Try It Yourself with This Sound Generator
If you’d like to try this sound-based method at home or before a trip, I’ve made an online sound wave generator available. It’s set to produce a 100 Hz sine wave for one minute, requires no download, works directly in your browser, and can be used with headphones or speakers (as long as you follow standard hearing safety precautions).
It’s important to follow the conditions of the study: moderate volume (around 80–85 dBZ), a quiet environment, and exposure before motion (for example, before getting into a car or boat). This short stimulation could become a simple and natural habit to ease the discomfort of motion sickness.
Conclusion
This discovery paves the way for new methods of preventing motion sickness based on sound stimulation. A simple exposure to a 100 Hz tone could become a practical and effective solution for sensitive travelers.
So, would you be willing to try this sound therapy on your next journey?