Altitude's effect on pitch of human voice


by Loren Booda
Tags: altitude, effect, human, pitch, voice
Loren Booda
Loren Booda is offline
#1
May29-07, 10:27 PM
Loren Booda's Avatar
P: 3,408
Does the decrease in atmospheric pressure with increasing altitude affect frequency of sound, such as that of a mountaineer's voice?
Phys.Org News Partner Physics news on Phys.org
Sensitive detection method may help impede illicit nuclear trafficking
CERN: World-record current in a superconductor
Beam on target: CEBAF accelerator achieves 12 GeV commissioning milestone
Splinter-Cat
Splinter-Cat is offline
#2
May30-07, 12:02 AM
P: 5
Altitude can do several things to the human respiratory system that can change how one talks. So yes, atmospheric pressure can change the way you sound.
Danger
Danger is offline
#3
May30-07, 01:18 AM
PF Gold
Danger's Avatar
P: 8,961
That's true, but the atmospheric pressure has as much to do with propogation of the sound as the pitch. The frequency is primarily determined by the length of the vocal chords; the longer they are, the lower the frequency. Thinner air, though, absorbs the energy of the sound before it can go very far.
That's the reason that people sound so 'duckish' after inhaling helium. The change of ambient gas density effectively (but not physically) shortens the chords. That is because the initial vibrations are atttenuated according to the density of the medium that they are propogating through.

edit: Due to more beers than I care to think about, and the interuption of that spamming MF, I think that I screwed up part of this post. I'm sure that my terminology was corrupted. Somebody save my ***, please.

edit: Mentors... I certainly understand why my rather heated response to that spamming f********* was deleted, but why is the object of my wrath still here? Did you check out that link?

edit: Been taken care of by Mentors; carry on...


Register to reply

Related Discussions
Pitch vs Noise? General Physics 16
How will the tragedy of the HIV epidemic effect human evolution? Biology 3
Why are pitch and frequency similiar to loudness and intensity? General Physics 3
Musical question regarding concert pitch/philosophical pitch Introductory Physics Homework 4
Variable Pitch Fans Mechanical Engineering 4