High-Volume Earphone Use Linked to Irreversible Hearing Loss

Prolonged use of earphones at high volumes can cause irreversible hearing loss, according to medical experts in Japan [1, 2].

This trend represents a growing public health concern as digital integration increases. With the rise of remote work and online education, the frequency of earphone use has surged, potentially exposing a massive global population to permanent auditory damage ^[2].

Prof. Ken Ito, head of otolaryngology at Teikyo University School of Medicine, said there is a risk of developing "earphone hearing loss" without the user even noticing ^[1]. The damage occurs when sound levels exceed safe thresholds, which destroys the delicate hair cells in the inner ear. Once these cells are gone, the hearing loss is permanent.

To mitigate these risks, the World Health Organization provides specific exposure limits. The guidelines state that users should not exceed 80 decibels (dB) for more than 40 hours per week ^[2]. If the volume increases to 90 dB, the safe exposure window drops significantly to a maximum of four hours per week ^[2].

Caster Junna Yamagata said that the opportunities to use earphones have increased due to online meetings and classes ^[1]. She said that the risk of hearing loss depends heavily on how the devices are used ^[1].

The scale of the problem is vast. Reports indicate that more than 1 billion young people worldwide are currently at risk of hearing loss due to their earphone habits ^[2]. Because the onset of the condition is often gradual, many individuals do not realize their hearing is deteriorating until the damage is already severe.