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# THE PHYSICS OF THE HUMAN VOICE

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## emmalie Saljoughi

on 23 May 2014

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#### Transcript of THE PHYSICS OF THE HUMAN VOICE

THE PHYSICS OF THE HUMAN VOICE
By:
Emmalie Saljoughi
In order to know the Physics you first must learn how the sound is produce.

So what body parts are used in the process?
In order to produce a sound you must have air, so the very beginning stage starts in the lungs.
From the lungs the air is pushed through the throat to the mouth and nasal cavity.
Basic Idea:
Once in the mouth and nasal cavity the air is simply pushed out.
Now let me make it complicated...
How does physics play into the voice though?
The vocal folds resonates for and filter sound waves produce through the air being forced threw.
The tension of the vocal chords determine the frequency of the sound.
The amplitude is controlled by varying the average amount of air pressure behind the vocal folds.
The human voice is sound waves that have been altered by the vocal chords in the larnyx. Frequency and amplitude are contoured by the amount of air pushed through a certain angle of the folds.
The physics of the voice is primarily the vibration of air particles that produce sound waves whose frequency and amplitude is determined through the tension and amount of air applied.
Men typical frequency is 85-155 Hz in just a normal speaking voice.

Women have a typical 165-255 Hz frequency.

Children tend to have higher frequencies of
255-300 Hz.

When we choose to sing our voice can extend 4 octaves.
The lowest singing frequency the male vocal chords can produce is 65 Hz.
The highest singing frequency the female vocal chords can produce is between 1,000-1,280 Hz.
However, the normal frequency for a female scream is 3,000 Hz.
Work Cited:
"Audio Oddities: Frequency Ranges of Male, Female and Children's Voices.." Audio Oddities: Frequency Ranges of Male, Female and Children's Voices. N.p., 1 July 2009. Web. 23 May 2014. <http://www.axiomaudio.com/blog/audio-oddities-frequency-ranges-of-male-female-and-children’s-voices/>.
Livelybrooks, Dean . "Physics of Sound and Music-- PHYS 152-- Lecture 10." Physics of Sound and Music-- PHYS 152-- Lecture 10. N.p., n.d. Web. 23 May 2014. <http://hendrix2.uoregon.edu/~dlivelyb/phys152/L10.html>.
The Human Voice System. Dir. Dan Izzo . , . Film.
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