Swapnil
- 459
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They say that the unit bel was originally defined as:
B = \log\Big(\frac{P_1}{P_2}\Big)
But then it turned out to be a large unit and people stated using decibels:
dB = 10\log\Big(\frac{P_1}{P_2}\Big)
I don't get this. One decibel is one-tenth of a bel, then shouldn't dB be actually:
dB = \frac{1}{10}\log\Big(\frac{P_1}{P_2}\Big)
?
B = \log\Big(\frac{P_1}{P_2}\Big)
But then it turned out to be a large unit and people stated using decibels:
dB = 10\log\Big(\frac{P_1}{P_2}\Big)
I don't get this. One decibel is one-tenth of a bel, then shouldn't dB be actually:
dB = \frac{1}{10}\log\Big(\frac{P_1}{P_2}\Big)
?