SOUND POLLUTION

*  Sound pollution is a serious problem like air, water pollution. It is harm full to human beings.

*W express the loudness of the sound in decibels (dB) ,which we have already learned.

* The sound in our normal conversation is about 60db.

* If the loudness exceeds 80db,the sound becomes physically painful.

*If a person is being exposed to the sound of 80db continuosly it may lead to hearing problems.