1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Sound loudness

  1. Dec 12, 2009 #1
    1. The problem statement, all variables and given/known data

    How many decibels does the loudness of a sound increase if its intensity increases 25 times?

    2. Relevant equations

    [tex]dB = 10 log\frac{I_{b}}{I_{a}}[/tex]
    3. The attempt at a solution

    [tex]\frac{I_{b}}{I_{a}} = \frac{25}{1}[/tex]

    [tex]dB = 10 log\frac{25}{1}[/tex]
    [tex] dB = 13.98[/tex]
     
  2. jcsd
  3. Dec 12, 2009 #2

    ideasrule

    User Avatar
    Homework Helper

    Correct.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook