The difference between loudness and intensity of sound can be found below in tabular form.

Distinguish between loudness and intensity of sound.

Loudness	Intensity
Loudness is the measure of sensitivity of the ear to sound which can differentiate between loud and soft sound.	The amount of sound energy passing through a unit area in one second is called the intensity of sound.
Loudness may be different for different observers that depends on the sensitivity of the ears.	It does not depend on the sensitivity of the ears.
It’s unit is decibel (dB).	Its unit is watt/m2.

Loudness

Intensity

Loudness is the measure
of sensitivity of the ear
to sound which can
differentiate between
loud and soft sound.

The amount of sound
energy passing through
a unit area in one second
is called the intensity of
sound.

Loudness may be
different for different
observers that depends
on the sensitivity of the
ears.

It does not depend on the
sensitivity of the ears.

It’s unit is decibel (dB).

Its unit is watt/m2.

Chapter 11 NCERT Class 9 Science SOLUTIONS

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Chapter 11 NCERT Class 9 Science SOLUTIONS

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