Auditory acclimatization, a short exposure time to strong noise, raises the hearing threshold by more than 10 dB, which can be recovered within a few minutes of leaving the noise environment. Auditory acclimatization is a phenomenon in which a persistent sound stimulus causes a decrease in auditory perception. The auditory system generally to a stable sound source perceptibility in the first 1-2 minutes decreased, and then quickly stabilized at a level, auditory adaptation is characterized by it is a balanced process. The research method of auditory adaptation is the loudness balance method. That is, with a certain sound intensity (such as 80 dB) of pure sound effect on the left ear, with another frequency of the same but variable sound level of the sound at the same time on the right ear, so that the two equal loudness. Then, stop the sound in the right ear and let the left ear continue to listen for 3 minutes. After this acclimatization period, the right and left ears are made equal again, at which time the equal sound level of the right ear often decreases, e.g., to 60 decibels, with an acclimatization amount of 20 decibels. Auditory adaptation (auditory adaptation), is due to the auditory stimulus for a longer period of time in the auditory organ caused by the phenomenon of auditory perceptual changes. 1, hearing impairment refers to the auditory system of sound transmission, sound sensing and comprehensive analysis of sound at all levels of the nerve center of organic or functional abnormalities, resulting in varying degrees of hearing loss. It is customarily referred to as deafness. Only severe hearing loss is called deafness, which is manifested by the patient’s inability to hear any speech in both ears. Hearing loss has not reached this serious degree, it is called hearing loss. 2, deafness is generally believed that the language frequency (0.5, 1.2Hz) average hearing threshold in 26dB or more, that is, there is a hearing impairment, hearing loss of 70dB or less is referred to as re-listening to more than 70dB for deafness, clinically used to collectively referred to as deaf (deafness). Various acute infectious diseases, bacterial or viral infections, such as epidemic encephalitis B, mumps, purulent meningitis, measles, scarlet fever, influenza, herpes zoster, typhoid fever, etc. can damage the inner ear and cause different degrees of sensorineural deafness.