Needless to say, in industrial factories, busy streets, noisy commercial centers and public places, noise is everywhere and exceeds the standard seriously. Noise control has become the main problem of purifying social environment, and there are many methods to deal with noise. For example, starting from the source of noise, installing silencers and maintaining machinery and equipment regularly can reduce the friction between machines, thus reducing noise. The car is the noise source of the street, so the maximum decibel of the car horn (the maximum decibel acceptable to the human ear in a quiet environment) should be set by the state. The second is to reduce the noise in the process of sound transmission, such as installing sound insulation walls on both sides of the road, increasing the height of green belts, and planting trees to make both sides of the road as wide as possible. The third is to start with the recipients, such as people, animals and plants. In order to reduce noise pollution, people can wear earmuffs on their ears to reduce the damage of noise to the eardrum. Plants are natural barriers to absorb noise, and excessive noise will also bring various problems to plants. Noise will harm people's health, not to mention plants.
In my opinion, the most effective way is source governance, which can not only reduce the capital investment of other governance methods, but also save time and effort, ensure efficiency and speed up the effectiveness of governance. In fact, the most important thing is to improve people's comprehensive quality. Someone once did an experiment: pretending to drop something in the middle of the road, picking it up in a hurry, but deliberately delaying the time. At this time, depending on the driver's reaction, 95% drivers will honk their horns hard and see anxious and disgusted faces through the windshield; 1% drivers will get off to help this "poor" pedestrian; 4% drivers will wait for this pedestrian silently. And these 5% drivers are truly qualified people. If people's comprehensive quality and awareness of caring for others are high, then establishing laws and measures to control noise becomes a code of conduct, because people can consciously abide by relevant regulations and think for others, and the noise will never exceed the standard.
Utilization of noise
We all know that sound has energy, and whether this energy can be used in life or military. Let's imagine: If noise energy can replace electricity, how much can China save on coal and non-renewable energy used to generate electricity? If noise can replace other power-driven machines and machinery, what will China's power resources look like? Ultrasound can be used to detect the human body. If noise energy is controlled, human diseases can be eliminated without harming human body (by bombarding tumors, viruses, stones, etc.). With noise energy, the diseases that remain in the body can be eliminated. How much will people's pain be reduced? How easy will it be for the state to invest in medical care?
Infrasound waves can endanger people's health without anyone knowing, and if noise energy is collected and applied to the military, then the world's war mode will change from informationization to "noise". This controlled amplification or reduction of energy can also achieve unexpected results and make the battlefield truly smoke-free. This will also have an extremely important impact on strengthening national defense construction and improving comprehensive national strength and scientific and technological strength.
Noise has both advantages and disadvantages. If used properly, it will be another successful example of turning waste into treasure, and it will also promote human and social progress and be a renewable substitute for saving resources. It will also be a favorable weapon for maintaining world peace and a powerful weapon against any form of war.
Supplement to the question: specify the methods or examples that need to be improved or improved. Thank you.