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Hi,
Curtis Osterhoudt pointed out a good source explaining what helium does to speech:
<http://phys.unsw.edu.au/phys_about/PHYSICS!/SPEECH_HELIUM/ speech.html>
Let me quote the source:
"The speed of sound is greater, so the resonances occur at higher frequencies: the second resonance has been shifted right off scale in this diagram."
This is fine and makes perfect sense. But then the text continues:
"The flesh in your vocal folds still vibrates at the same* frequency, so the harmonics occur at the same frequency."
The flesh part makes sense but why the *resonances* occur at higher frequencies whereas the *harmonics* occur at the same frequency?? I thought that in this context resonances and harmonics mean the same thing. What am I missing?
Regards,
Antti
Antti Savinainen, Ph.D., B.Ed.
Adjunct Professor (University of Jyväskylä)
Senior Lecturer in Physics and Mathematics
Kuopion Lyseo High School
Finland
E-mail: <antti.savinainen@kuopio.fi>
Website: <http://kotisivu.dnainternet.net/savant/>
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