Sound also travels in a similar way.When an object produce a sound, the sound travels away from the object
in all directions.The object producing the sound is called the source of the sound.
The loudness of a sound decreases as the sound travels farther away from the source.So, when we are very close to the source of a sound, it is very loud.As we move away from the source, the sound becomes softer.
Sounds requires a medium to travel.When an alarm clock rings, we can hear the sound because the sounds travels through the air and reaches our ears.In this case air is the medium through which sound travels.A space that has no matter in it is called a vacuum,A vacuum can be created in an empty jar by sucking out all the air from it.We cannot hear an alarm clock when it rings inside a jar with a vacuum,because there is no air or any other medium through which the sound can travel.Sound can travel through solid,liquid,and gas
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