What can be done to the issue of noise pollution, especially in underdeveloped and developing countries?
Noise pollution is a difficult phenomenon to treat and much more to eradicate as it is directly related to the expansion of cities, where large concentrations of people, transport, industry and commerce are the main sources of noise. In simple terms, noise is an "unwanted sound" that affects the health and well-being of men and women. Any noise that causes adverse effects on people can be classified as polluting.
However, being a population that is generated almost inertly it is almost impossible to develop a device capable of absorbing all the unwanted noise, but perhaps in the future it will be possible. But on an individual scale there are many things that if propagated can greatly reduce the propagation of undesired noise.
The beginning would be not to practice noisy behaviors at home: screams, heels, slamming doors, use of appliances in periods of rest, in addition to controlling and moderating the volume of music equipment, radio, television, video games, ensuring that you only listen at home.
Another detonator of this type of pollution is traffic noise, so that is where we can contribute most by not using the horn of the car, except in situations of imminent danger.
In short, the control of this type of phenomena is only controllable under circumstances where the general population executes moderate measures of behavior control.