Soundboard

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 Code Number :   3B25.40  

Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources.

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Condition :   Excellent
Principle :   Sound Boards and Sound Transmission
Area of Study :  Acoustics
Equipment :   Music Box element with plastic box, Table top.
Procedure :   Take the plastic box off the music box element.  Wind up the element and hold it in the air while it is playing.  The sound should be just barely audible.  Attach the plastic box to the element, or touch the element to a table top or tuning fork box.  The sound become very audible with the addition of the chosen sound board.

The front and back of a miniature piano sound board are shown with this demo.  Tapping on various places on the sound board will reveal those spots with good resonance.

 

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   References
 

"Music Box Mechanism", P7-7330, Arbor Scientific, 2004.

 



Mail Questions and Comments to:  Dale Stille