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Physics of human voice

  1. Jan 4, 2012 #1
    Hi everyone. I have a basic question about the biomechanics of speech. If this is already answered please direct me to the solution.

    I'm trying to determine the main factors which determine the volume of a voice.

    What I think I know: when a human produces sound, air is forced out of lungs and hits various parts of the vocal passage causing them to vibrate and produce sound. Intuitively, I originally thought to increase volume, I simply needed to increase energy, and thus increase the speed the air by exhaling faster.

    While this does work. I know there are ways to increase volume without increasing the speed of exhale. I'd like to know how these mechanisms would work. Any thoughts?
  2. jcsd
  3. Jan 4, 2012 #2


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    Well, I don't know myself, but the wikipedia article seems to have a lot of info. This is focused on developing the singing voice, but I would think at least some of it applies to normal speech as well.
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