Therefore, a sound intensity of 20 dB is not twice as loud as a sound intensity of 10 dB, but is 10 times as loud, and a sound intensity of 30 dB is 100 times as loud as a sound intensity of 10 dB. Similarly, a sound intensity of 50 dB would be 10,000 times as loud (10 x 10 x 10 x 10) as a sound of 10 dB. This is how the decibel scale works. It is totally unlike the linear percent scale. Now lets see the fallacy of trying to compare this âfunnyâ decibel scale to the percent scale.
Report Abuse. 1  Fastest time to run a mile is around 4 minutes. 2  The average time to walk a mile is 12 minutes, so half a mile would be 6 minutes. 3  well the average human walks at 3 mph so thats a mile every 20 mins and half a mile every 10 mins.  i walk a mile every morning in 15-20 minutes, so probably 10 minutes.
How long it can take you to walk 1 mile will depend on your speed.  On average, a healthy person can walk 1 mile in about 15 minutes.