How many times more intense is a sound of 60dB than a sound of 30dB to the nearest 10?

Question

1. How many times more intense is a sound of 60dB than a sound of 30dB to the nearest 10?

2. The sound at supper is measured at 62dB. The sound at the library is measured at 26dB. How many times more intense is the noise at supper than the noise at library?

Answer 1

each time it increases by ten it doubles. Therefore 60 or 30+3x10 will be 3 times more intense.

likewise 62=26==+3.6x10

therefore 62 is 3.6 times as many decibels as 26

xx

Answer 2

As you increase form 10dB to 20dB, the increase is a power of 10

1. from 30 to 60 is 1000 times as intense

2. 22 to 62 or 26 to 66 is 10,000 times