Intensity of sound wave when given sound intensity level.

  • Thread starter Ericv_91
  • Start date
  • #1
25
0

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. :uhh:
 

Answers and Replies

  • #2
ehild
Homework Helper
15,543
1,914
Recalculate 10^3.4.

ehild
 
  • #3
25
0
My calculator decided to cut off a 5 after the 2. *sigh*. Thanks.
 
Top