A group of researchers from Nagoya University Graduate School of Medicine in Japan, detected the sound with a frequency of 100 Hz, which alleviates unpleasant symptoms in people with seasickness.
It is noted that the sound, discovered by Japanese scientists Takumi Kagawa and Masashi Kato, safely relieves symptoms of motion sickness, stimulates the inner ear, and improves the functioning of of the vestibular system. Researchers say that just one minute of sound stimulation is enough to reduce the feeling of dizziness and discomfort experienced by people with motion sickness while in transport.
«Our research has shown that significant stimulation using a unique sound called «sound spice» alleviates symptoms of seasickness, such as nausea and dizziness The required sound level corresponds to the range of everyday exposure to ambient noise, which suggests that the sound technology is both effective and safe», — Takumi Kagawa says.
Scientists have checked the effect of this sound in simulations with mice and humans, determining that the optimal frequency is 100 Hz. According to them, there is growing evidence that stimulating the inner ear with this sound can improve the sense of balance.
«The vibrations caused by this sound stimulate the otolithic organs in the inner ear, which determine the linear acceleration and gravity of the head. This suggests that unique sound stimulation can broadly activate the vestibular system, which is responsible for maintaining balance and spatial orientation», — Masashi Kato emphasized.
Scientists checked the devices, that reproduce this sound on volunteers. First, the volunteers were given the sound and then induced to feel seasick using a swing, a driving simulator and driving in a car. The researchers paid attention to posture control, ECG readings, and the results of a survey assessing the degree of seasickness symptoms.
Exposure to a unique sound before exposure to a driving simulator increased sympathetic nerve activation. The researchers found that symptoms such as dizziness and nausea, which are often experienced during seasickness, were alleviated.
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The results of the study were published in the journal Environmental Health and Preventive Medicine
Source: SkiTechDaily
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