Noise is invisible, but the harm to the human body is immediate.
Different levels of noise affect people to different degrees. In general, small noises may cause only mild discomfort, which may gradually increase as the noise increases. If the noise exceeds a certain limit, it can have serious negative effects on people, such as affecting hearing, sleep, work and study, etc.
And different types of noise can also affect people differently. For example, some noises may cause a lot of psychological stress on a person, while others may not have much of an impact.
The impact of noise on the auditory system is mainly manifested in the following aspects:
1. Temporary hearing threshold displacement: This refers to the temporary hearing threshold change caused by human or animal exposure to noise, and the hearing can be restored to the original level after a period of time after leaving the noise environment. For example, if you are exposed to a strong noise environment for a short time, the sensitivity of the auditory organ decreases, and you have a "small" or "far" feeling of the outside sound after disengagement, the hearing threshold of the hearing examination can be increased by 10 15db, and it can be recovered within 1 min of leaving the noise environment. 2. Permanent hearing threshold displacement: When the noise intensity exceeds a certain critical level, it will cause permanent irreversible damage to the auditory system, and even damage the auditory central system. This hearing loss is related to the intensity of the noise, the timing and number of exposures to the noise, and the nature of the noise. Noise can also cause problems such as hearing loss, tinnitus, and deafness. Therefore, in order to protect people's health and comfort, measures need to be taken to control the spread and impact of noise.