The psychological sensation of loudness B is measured in decibels and is defined with reference to the intensity, , of a barely audible sound by the following equation. In this equation, I is the intensity of the sound in question.

Question

B=10log 1/1o
If the sound of a jet engine during takeoff is 140 decibels and the sound of a rock concert is 115 decibels, how does the intensity of the sound of the jet engine compare to the intensity of the sound of the rock concert?
I got that the intensity of the concert would be louder...is this right?

Answer 1

check your typing
your equation contains no l
besides that, what is 1o ?

Answer 2

im sorry the 1 is l and the zero is the lower exponet

Answer 3

You mean I think:

Db = 10 log (I/Io)

Answer 4

no, wrong. The higher the Db the louder

140 = 10 log (Ijet/Io)
115 = 10 log (Iband/Io)

14-11.5 = log (Ijet/IIband)

10^2.5 = Ijet/Iband = 316

the jet intensity (power) is 316 times the rock concert

Answer 5

Thanks i see what i did wrong

Answer 6

is it 21?