Intensity of sound wave when given sound intensity level.

[Ericv_91]

Homework Statement

What is the intensity of sound wave with sound intensity level 34 dB?

Homework Equations

B = (10dB) log (I/Io) B = sound intensity level, I = intensity, Io= 1.0x10^-12 W/m^2

The Attempt at a Solution

I figured it would be simply a matter of rearranging the equation above to solve for I and entering all the values giving:

I = Io x 10^(B/10 dB)
I = (1.0x10^-12) x 10^(34/10)
I = 2.0x10^-9 W/m^2

However the assignment tells me that I am wrong. Am I missing something very very basic? Am I using the wrong equation all together? My textbook won't tell me, so I've turned to Physics Forums.

 

[ehild]

Recalculate 10^3.4.

ehild

 

[Ericv_91]

My calculator decided to cut off a 5 after the 2. *sigh*. Thanks.