Calculating dB with I

  • Thread starter RedPhoenix
  • Start date
  • #1
26
0

Homework Statement



Calculate the sound level in decibels of a sound wave that has an intensity of 4.00u "W/m2.

Homework Equations



dB = 10log(I/Io)

The Attempt at a Solution



dB = 10log(4/1E-12) = 126.02 db

Book says 66db. It vaguely covers this topic, not sure if I had missed something or not.
 

Answers and Replies

  • #2
ideasrule
Homework Helper
2,271
0
That's 4.00 micro-watts per meter squared, or 4.00 * 10^-6 W/m^2. It isn't 4 W/m^2..
 
  • #3
26
0
That's 4.00 micro-watts per meter squared, or 4.00 * 10^-6 W/m^2. It isn't 4 W/m^2..


pft... I completely overlooked that. Its getting late!
 

Related Threads on Calculating dB with I

  • Last Post
Replies
1
Views
1K
Replies
4
Views
2K
Replies
2
Views
9K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
4
Views
4K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
2
Views
761
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
0
Views
1K
  • Last Post
Replies
8
Views
2K
Top