What is Noise? How to measure noise? Frequency Analysis From where noise pollution originates? Why we should bother about noise? How to control noise pollution? What should be the guidelines for the normal people to reduce noise pollution?
Simple term – noise is nothing but unwanted sound. Sound - a form of energy -> reaching through body to ear and ear causes the sensation of hearing through nerves. Noise pollution’s Consists 1. Sender (Source) 2. Receiver 3. Transmission Path
Intensity is measured in SPL – Sound Pressure Level it is measured in DB. Frequency analysis allows to separate main components of signal by dividing frequency range interest into small frequency band. Some sounds can not be divided into set of harmonically related pure tones. Generally noise is produced by the source of community noise. Eg. Aircraft engine, automobiles, submarine.
ď śIt may vary from daily activities. It may domestic, natural, commercial, Industrial ‌ Source http://discovery.bits-pilani.ac.in
ď śGenerally it is neglected. But it impacts on human and also living organisms. Its adverse effects are shown below. 1. Damage of material 2. Nervous System 3. Human Performance 4. Physiological effect 5. Annoyance 6. Sleeplessness 7. Permanent loss of hearing
ď śhttp://discovery.bits-pilani.ac.in
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