Chapter : 5. Sound
Characteristic of Sound - Loudness
(A) LoudnessLoudness of a sound depends on the amplitude of the vibration producing that sound.
Greater is the amplitude of vibration, louder is the sound produced by it.
The loudness of a sound also depends on the quantity of air that is made to vibrate. Loudness of sound is measured in decibel (dB) unit.
|Sound ||dB ||Loudness |
|Rocket at take off ||200 ||Dangerously loud |
|Aircraft engine ||100–200 ||Painfully loud |
|Pneumatic drill ||100 ||Very loud |
|Heavy traffic ||90 ||Very loud |
|Loud music ||90 ||Very loud |
|Ordinary coversation ||40-60 ||Moderate |
|Whisper ||20 ||Faint |
|Rustling of leaves ||10 ||Very faint |
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