What is the necessity of noise control?

1. Even noise at 90 decibels can cause about 10% of people to become deaf. Noise between 120 to 130 decibels can cause pain in the ears; louder noises can damage the auditory organs.

2. In the nervous system, the damage caused by noise should not be underestimated. Noise can lead to deafness. After exposure to high noise levels for a period of time, it can cause certain auditory fatigue, making hearing dull, which can recover after rest. However, if one works for a long time in high noise levels, auditory fatigue cannot be restored, leading to lesions in the inner ear auditory organs and resulting in noise-induced deafness, also known as occupational hearing loss.

Noise can be irritating, leading to difficulty in concentration and reduced work efficiency, as well as hindering rest and sleep. Under intense noise levels, it can also easily mask conversation and risk alert signals, distracting people and potentially causing workplace accidents. Prolonged exposure to high levels of noise may trigger certain diseases. It has been found that workers exposed to long-term intense noise not only suffer from deafness but also experience symptoms such as dizziness, headaches, nervous weakness, and indigestion, which can then lead to hypertension and cardiovascular diseases. Even more intense noise can affect the vestibular cavity of the inner ear, causing dizziness, nausea, vomiting, and eye tremors, blurred vision, fluctuations in breathing, pulse, and blood pressure.