3D32.35 - Resonance in Cavities - Horn

Insert one of the mouth pieces into the paper-mache' horn and play.  Discrete frequencies should result.
Code Number:
3D32.35
Demo Title:
Resonance in Cavities - Horn
Condition:
Excellent
Principle:
Resonance in Pipes
Area of Study:
Acoustics
Equipment:
Paper-mache' horn.
Procedure:

Insert one of the mouth pieces into the paper-mache' horn and play.  Discrete frequencies should result.

References:
  • "Simple Sound Demonstrations", TPT, Vol.  36, # 1, p.  16 Jan. 1998.
  • Stephen Luzader,  "PC and PVC Acoustics Demonstrations",  TPT, Vol. 28, # 7, p.  459, October 1990. 
  • Rev. J, Lukin, The Engineers What They Did and How They Did It, 1901, p. 135.
  • 1.6:  Jearl Walker, "Gramophone Horns", The Flying Circus of Physics with Answers.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.