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H6-04. Helium Voice
Purpose
To demonstrate the rise in frequency of vocal formants due to the increase in the speed of sound in a light gas.
Equipment
Tank of helium with regulator and pressure gauges.
Suggestions
Take a couple of big breaths of air first to get plenty of oxygen, then breath out completely before inhaling the helium.
Images
Description
Snort a lungfull of helium and talk and sing normally. Your voice takes on a squeaky "Donald Duck" character due to the increase in frequency of your vocal formants.
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See pagesh1. nature of sound
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See pagesh2. wave properties of sound
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See pagesh3. standing sound waves
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See pagesh4. music
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See pagesh5. the ear
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See pagesh6. the voice
-
See pagesh1. nature of sound
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See pagesh2. wave properties of sound
-
See pagesh3. standing sound waves
-
See pagesh4. music
-
See pagesh5. the ear
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See pagesh6. the voice
Physics Lab Demos