Physics of Human Voice: Factors Affecting Volume

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The discussion centers on the biomechanics of speech and the factors influencing voice volume. It highlights that sound production involves air from the lungs causing vibrations in the vocal tract. While increasing exhalation speed can boost volume, there are other mechanisms to enhance loudness without this method. The conversation suggests exploring resources like the Wikipedia article on vocal pedagogy for further insights applicable to both singing and normal speech. Understanding these factors can help in improving vocal projection effectively.
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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?
 
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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.
http://en.wikipedia.org/wiki/Vocal_pedagogy
 

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