A condition that is causing the noise interference. May come from various audio sources. Both human,If animals or machines by up to 85 decibels can harm the ears, even if more than 90 decibels can harm the ears a lot. So do not go near the area too noisy to get it
.The sources of external noise worldwide is mainly construction and transportation systems, including motor vehicle noise.Planes and trains [1] [2] or even the urban poor may cause noise pollution as well. And the industrial side.Noise both inside and outside the building, there are many types such as audio alarms of cars, sirens, emergency signals, mechanical devices, flares, horn, air compression, Burr Street, a dog barking, appliances, shows. Light and SoundEntertainment sound system, electric megaphone and shouts of human
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