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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


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