difference between phon and decibel related to loudness??
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decibel means a unit for measuring loudness of sound.
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Decibel is generally expressed as for sound intensity and the phon is a unit of loudness level for pure tones. Decibel measures the actual pressure of the sound waves whereas phon measures the perceived sound as heard from human ears. Decibel is an objective unit whereas phon is a subjective unit.
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