Page 14 - 10-phy-11 Sound

11. Sound eLearn.Punjab

However, some sounds produce unpleasant effects on our ears Physics Insight
such as sound of machinery, the slamming of a door, and sounds
of traffic in big cities. Sound which has jarring and unpleasant
effect on our ears is called noise. Noise corresponds to irregular
and sudden vibrations produced by some sounds.
Noise pollution has become a major issue of concern in big cities.
Noise is an undesirable sound that is harmful for health of human
and other species. Transportation equipment and heavy machinery
are the main sources of noise pollution. For example, noise of
machinery in industrial areas, loud vehicle horns, hooters and
alarms. Noise has negative effects on human health as it can cause
conditions such as hearing loss, sleep disturbances, aggression,
hypertension, high stress levels. Noise can also cause accidents by
interfering with communication and warning signals.

Animation 11.6 : Noise pollution Sound displays all the
Source & Credit : makeagif properties of waves when it
interacts with materials and
14
boundaries.

V: 1.1