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Unformatted text preview: organ pipes with helium gas. The velocity of sound in helium is larger than the velocity of sound in air by a factor of v helium / v air = 2.9. How will your prank aFect the tones produced by the organ? Note : An experiment similar to this one is often performed at carnivals, when a performer ±lls his vocal tract with helium gas and then demonstrates his new voice. The pitch of the human voice is determined by the frequencies of standing waves in the vocal tract. There will be no change 1. The notes will all go down in frequency by this factor 2. The notes will all go up in frequency by this factor 3. ____________________ [weight: 1] 3 OK Logout ajcg 220/fall2011 Reading_Quiz Problem Listing https://chip.physics.purdue.edu/cgi-bin/220/fall2011/Inst. .. 1 of 1 12/07/2011 03:10 PM...
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This note was uploaded on 12/07/2011 for the course PHYS 220 taught by Professor Chang during the Fall '09 term at Purdue University-West Lafayette.
- Fall '09