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~Noise Pollution~

-Harmful effects
-Measures can be taken

News Archieve
-Noise Pollution

Episode
-Sound Intensities
What is n.gif (8369 bytes)oise ap.gif (7893 bytes)ollution ?

b17.gif (1892 bytes) Noise is unwanted sound

b17.gif (1892 bytes) Offensive noises include road traffic, aircraft,
    air-conditioners, televisions and mah-jong

b17.gif (1892 bytes) Noise can be measured by a sound meter and is
    expressed in decibel (dB) units.