Genially sin título
Jose Angel
Created on March 28, 2019
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Transcript
Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with harmful impact on the activity of human or animal life. The source of outdoor noise worldwide is mainly caused by machines, transport and propagation systems
Noise pollution
Causes Acoustic Pollution
1. Industrialization: Most of the industries use big machines which are capable of producing large amount of noise2. Social Events: Noise is at its peak in most of the social events.3. Transportation: Large number of vehicles on road, underground trains... Produce heavy noise and people get it difficult to get accustomed to that.
4. Construction Activities: Under construction activities like the construction of bridges, dams, buildings, stations, roads,take place in almost every part of the world.5. Household Chores: We are surrounded by gadgets and use them extensively in our daily life.
Sound intensity level (db)
0: Threshold of hearing at 1000Hz.35: Whisper at 2 meters60: Conversationm70: Vacuum Cleaner at 3 meters85: Heavy Truck at 15 meters125: Jet Takeoff at 100 meters140: Threshold of pain