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No. decibel (dB) is a logarithmic scale. Every time the decibels increase by 10 (10 more, not 10 times as much), the sound will get 10 times louder. For example, From 0 dB to 10 dB, or from -5 dB to +5 dB, or from 100 dB to 110 dB, will each increase the loudness by a factor of 10.
70 dB is 10 times louder than 60 dB.
The power is 100.8 = 6.31 times as much.
A 10 dB sound pressure level (SPL) is 0.000063 pascal and 100 dB is 2 pascal. Loudness is a problematic psycho acoustic feeling. I don't know what three times louder really means.
He measures times by events his experiences rather than by societal measures time.
51dba is almost 3 times quieter than 59 dba.