The hearing threshold of pure tone and speech is 26 to 40 dB for mild deafness, 41 to 55 dB for moderate deafness, 56 to 70 dB for severe deafness, 71 to 91 dB for severe deafness, and more than 91 dB for total deafness. normal electrical hearing should be less than 25 dB. therefore, we should pay attention to avoid wearing earplugs for a long time to listen to music, which may lead to neurological hearing loss. The hearing loss phenomenon is neurological, do not frequently pull out the ears and ears into the water, which can lead to otitis media and other diseases caused by the conductive hearing loss phenomenon. In case of hearing abnormalities, it is recommended to visit the ENT department as soon as possible for endoscopy, electroaudiometry and acoustic conductance examination to detect middle ear inflammation and nerve damage.