decibel levels of sound waves

Discussion in 'Programmer's Corner' started by butterfly, Feb 28, 2009.

  1. butterfly

    Thread Starter New Member

    Jan 28, 2009
    3
    0
    hi all,
    i need to find the decibel value of a sound using MATLAB. I have a sound file in .wav format. I used the wavread command and plotted it using plot command. In the graph, I get values in y axis which are in the range of 0-1. Are these values in decibel?
    If not, is there a method to find the decibel value of a sound using MATLAB. Is there a command or toolbox which can be used to find the sound intensity.

    thank you.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    power of sound in dB=10log(power of sound not in dB)
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
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