Sound Vibrations
Sonometer
   Used to verify the laws of vibrating strings, frequency comparison with vibrating bodes and determination of the frequency of a tuning fork by tuning a sting in union with it.  It utilizes the basic design of the violin, bass, guitar and piano.   There is a hollow wooden
resonance chamber (155" x 12" 8 cm)  and strings are stung across it.  However these are mounted so that they may be used for some serious science experiments.  One end of a brass and steel wire is fixed to one edge of the resonance chamber. The other end is secured with a pegged tensioning key.  Start by adjusting the string tension so that it produces the same note as a tuning fork. If you are really good at it, then try it with a musical instrument.  But the Sonometer doesn't stop there.  A pulley and hook are provided for the third steel wire which can be tensioned by masses so that you can determine the necessary tension. Comes with two steel wires and a brass wire.  They are easy to break but can be easily replaced at any guitar or piano store.  Two meter scales graduated in millimeters. 
(Weights not included) 
  No. SF320-SM. Only $84.95
Sonometer Weights - at left
Tuning Forks and Mallet - above
 

 

Sonometer Weights
Four slotted iron masses of 500g each on a 500g hanger.
  No. SF320-SW.  Only $27.95
Chrome Plated Steel Tuning Forks
No longer available.
Aluminum Tuning Forks
Milled from non-rusting non-magnetic aluminum bar stock. 
   No. SF320-FA  Only $29.95
Striking Mallet
For activating tuning forks.  Made of wood with a rubber striking surface.
   No. SF320-FM  Only $2.95