![]() Most of the sound pressure, which is produced by the engine is emanating out of the vehicle by using the same piping as used by the silent exhaust gases absorbed by a series of passages and the chambers lined with roving, fibreglass insulation or resonating chambers harmonically tuned to cause destructive interference wherein opposite sound waves cancel each other out. It is designed in such a way to reduce the loudness of the sound pressure, which was created by the engine by way of acoustic quieting. Source: In most internal combustion engines, mufflers are installed within the exhaust system. Also, cultivate the ground before planting and adding organic matter to the surface of the soil may also help to reduce noise when vegetations will be established.Īccording to USDA National Agro forestry Center a properly designed buffer of trees and shrubs can reduce noise by about 10 decibels or about 50% as perceived by the human ear. In fact soft ground is an efficient noise absorber. Plant trees with no space or less space to reduce noise pollution. Trees absorb sound waves with their branches and foliage. ![]() Evergreen shrubs that too with broader leaves provide year round noise protection so, they are best to plant.
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