Question

differentiate between loudness of sound and intensity of sound. ​

Answer 1

$\underline \mathtt{loudness \: of \: sound}$

1. The sensation produced in the ears which enables us to distinguish between a faint sound (feeble sound) and a loud sound is called loudness of sound.
2. Loudness of sound is measured in the unit of decibel (dB)
3. Loudness of sound depends on the sensitivity of ears.

$\underline \mathtt{intensity \: of \: sound}$

1. The average of energy transported by a sound wave per second per unit area (perpendicular to the direction of propagation) is called intensity of sound.
2. Intensity of sound is measured in the unit of Watts per square metre (W/m sq)
3. Intensity of sound does not depend on the sensitivity of ears.

Answer 2

loudness of sound:

• Loudness is the measure of response of the ear to the sound.
• Loudness is measured in decibels.
• Loudness is dependent on the sensitivity of the human ears.
• Loudness is a subjective quantity.

Intensity of sound:

• Intensity is the sound power per unit area.
• Intensity is measured in Watt per meter square.
• Intensity is independent of the sensitivity of the human ears.
• Intensity is an objective quantity.