In order to attack the enemy unexpectedly, Mu Ying secretly went around the enemy's rear, suddenly raised the flag in the valley, drummed and sounded the bronze horn, making a rhythmic and deafening noise. Stimulated by this noise, the enemy was frightened. In the chaos, they were beaten out of the water and fled.
The victory of the Ming army was largely attributed to a hero-noise.
Noise is a major topic in environmental psychology and an unpleasant sound. In this story, noise can confront the enemy, which in itself shows that noise can cause bad psychological stimulation to people.
Many years ago, there was a report in the United States that a man couldn't stand the noise of the steam hammer on the construction site near his home, so he ran forward and buried his head under the steam hammer, and his head was smashed into a paste. The owner of this tragedy is likely to be a little depressed, or at least have poor psychological endurance. But on the other hand, doesn't it also mean that noise has a serious impact on people's psychology?
Many writers like to stay away from the city and write in remote mountain villages just to avoid the dense noise of the city.
Scientifically, noise refers to irregular sound whose waveform changes irregularly or exceeds 85~95 decibels. But in reality, this standard is not absolute. Because cheerful gongs and drums, slogans, shouts and firecrackers, although more than 85 decibels, and even some are irregular, will not cause psychological irritability of participants and appreciators. This is because participants and appreciators like or can accept this kind of voice, because they had a need for psychological catharsis at that time.
On the contrary, even the sound below 85 decibels, if it is irregular, such as chickens barking and dogs barking, will cause noise to some people. Some people like to raise fruit, and its paroxysmal cry is noise to some people, but it is like a lullaby to others.
Noise is widely harmful to people's physiological functions, such as deafness, sleep disorder, vegetative mental disorder, rapid heartbeat, hypertension, vasospasm, gastric dysfunction, abnormal gastric juice secretion, anorexia, hyperthyroidism, adrenal cortex function enhancement, sexual dysfunction, menstrual disorder and so on. Here I mainly talk about the psychological impact of noise effect.
Noise can cause people's irritability, bad mood, inattention, reduced work efficiency, affect rest and cause sleep disorders. This is the so-called noise law. Noise sometimes causes strong emotional interference to others and even confuses people. Ancient military strategists in China skillfully used noise as a weapon to attack the enemy in the war, because they understood this characteristic of noise.
Noise is also part of environmental pollution. Therefore, in hospitals, nursing homes and residential areas, honking horns and raising chickens and dogs are generally restricted. At present, most cities in China have banned setting off firecrackers in urban areas. These are all necessary measures to avoid the influence of noise.