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Question
Conversion formula for converting amplitude ratio (AR) into decibels is
Options:
A .  Decibel = 20 log10 (AR)0.5
B .  Decibel = 20 loge (AR)0.5
C .  Decibel = 20 loge (AR)
D .  Decibel = 20 log10 (AR)
Answer: Option D
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