What are the hazards of noise?

People often use "deafening" to describe the harm of strong noise to human body. People who work under noise for a long time, in addition to poor hearing, will also have symptoms such as dizziness, headache, neurasthenia and indigestion. Strong noise can also make people dizzy, vomit, blurred vision, and even cause changes in breathing, pulse, blood pressure, gastrointestinal peristalsis and so on. At this time, people's whole body microvascular blood supply decreases, fatigue occurs, and even speech ability is affected. Noise can also make people's intelligence decline. In Los Angeles, students in schools located along noisy highways scored much lower in reading and math tests than those in schools located in quiet areas.

The harm of noise to traffic is also obvious. Scientists have tried to expose rabbits to the extremely strong noise of 160 decibels. They will soon have high body temperature, disordered heartbeat, deaf ears, temporary blindness in eyes, and run around aimlessly. The creatures in the sea are very afraid of noise, so the propeller noise when the ship sails will make the nearby fish run away. For this reason, the fishing net of a fishing boat needs a fairly long towing rope, so as to spread the net far away and avoid the noise of the fishing boat engine from interfering with the fish entering the net. Someone invented a "noise bomb" according to the influence of noise on animals. The noise from this bomb can paralyze the auditory pathway nerves of fish and other marine animals, causing a short-term coma and thus floating to the surface. Fishermen can take the opportunity to catch big fish, leave small fish and protect aquatic resources.