An 18-year-old student in eastern China suffered temporary hearing loss after prolonged exposure to cicada noise while camping, prompting medical experts to warn that natural sounds can pose risks comparable to industrial noise.
The student, identified by the surname Wang, was camping in a forest in Ningbo, Zhejiang province, when he encountered a large chorus of cicadas. The insects’ clicking sounds intensified around midday, but Wang remained in the area until evening. He subsequently developed tinnitus and a sensation of fullness in both ears. As the cicadas quieted, he realized he could no longer hear birdsong or his phone notifications.
Wang sought immediate medical attention at Ningbo University No. 1 Affiliated Hospital. Examination revealed swelling in both ears. Dr. Li Ji, a senior physician in the otorhinolaryngology department, prescribed anti-inflammatory medication and advised strict avoidance of loud environments for at least 14 days. Wang’s hearing fully recovered after two weeks.
Dr. Li explained that while a single cicada produces sound rarely exceeding 70 decibels, a dense chorus can surpass 85 decibels — the recognized threshold for potential hearing damage. Prolonged exposure at this level can cause edema in the cochlea’s hair cells. These cells typically recover with rest over one to two weeks. However, if exposure continues or intensity is greater, the hair cells may undergo necrosis. Unlike other cells, they do not regenerate, resulting in permanent, irreversible hearing impairment requiring hearing aids.
The case highlights a common misconception that natural soundscapes are inherently safe. Medical professionals emphasize that duration and intensity determine risk, regardless of the source. Campers, hikers, and outdoor workers in regions with high insect activity are advised to limit continuous exposure to loud choruses and use hearing protection when necessary.
