The human body is continuously exposed to the noise environment, for a long time, will appear on the auditory cause temporary hearing threshold upward shift, hearing dull, but this situation does not last long, as long as leave the noise place to a quiet place to stay for a period of time, hearing will gradually restore the original state, this phenomenon is called temporary hearing threshold shift, also called auditory fatigue. Hearing fatigue in most cases after rest can restore normal hearing, but still need daily prevention, to avoid the gradual decline of hearing with age. Prevention: 1, pay attention to general health, accept the planned immunization, and actively prevent and treat acute infectious diseases and systemic diseases. 2.Use medication reasonably, do not abuse antibiotics, especially ototoxic antibiotics. 3.Treat various kinds of otitis media in a timely manner. 4.Increase efforts to control noise pollution and strengthen anti-noise measures, including the management of firecrackers. 5.Genetic counseling for marriage and childbirth, and good perinatal health care. 6.Restore the hearing screening program in the medical examination. 7.Conduct a universal newborn hearing screening program. Every newborn should receive hearing “initial screening” before discharge; those who fail should receive “re-screening” within 42 days; those who fail the “re-screening” should enter the diagnosis of hearing loss within 3 months and the diagnosis should be clear within 6 months and intervention should be made for those who are diagnosed. Newborns and infants with risk factors for hearing loss should be followed up until 3 years of age, even if they pass the screening.