(a) Draw a diagram to represent a sound wave.

(b) How does sound produced by a source reach our ears?


Figure below represents the sound wave of Small amplitude



Figure below represents the sound wave with high amplitude.



Figure below represents the sound wave with high pitch.



Figure below represents the sound with low pitch.



(b) Sound reaches our ears in the form of transverse waves or vibrations from its source of production.


A vibrating object creates compression and rarefaction of the surrounding air molecules, and those sound pressure waves in the air in turn cause the tympanic membrane in your ears to vibrate.


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