Normal hearing is 5 meters, due to environmental noise, more influencing factors, this method can not accurately determine hearing, can be carried out in the hospital hearing test. The doctor stands 5 meters away, the patient keeps quiet, stands sideways, ear to the doctor, the other ear is plugged tightly with a cotton ball, the doctor reads the words aloud softly, 1 word is read 2 times, let the patient repeat, 3 words are repeated correctly is recorded as hearing 5 meters. If the distance of 5 meters can not hear, to 3 meters to hear, it is recorded as 3 meters, and so on. Hearing ≤ 25 dB is considered normal hearing, hearing at 26-40 dB is considered mild deafness, i.e., inaudible beyond 3-5 meters. Hearing at 41-60 decibels is moderate deafness, i.e., you can’t hear from 1 meter away. A hearing level of 61-80 decibels is considered severe deafness, which requires shouting at the ear to be heard. 81 decibels or more is considered very severe deafness, which means that you can hear very loud sounds but cannot distinguish speech. Patients with hearing loss are advised to visit the ENT department to examine the external auditory canal and the middle ear of the eardrum, and to have a pure tone hearing threshold test and an acoustic impedance test. Hearing loss is usually caused by conductive and sensorineural deafness and should be treated promptly. It is important to keep the outer ear canal clean and dry, and avoid picking at the ear canal frequently to avoid damaging the eardrum and the skin of the outer ear canal, which can affect normal hearing.