Abstract
An impedance head designed and constructed at the Physikalisch Technische Bundesanstalt in Braunschweig, Germany is used to illustrate the pattern of resonances in an air column confined to a cylindrical tube closed on one end and open on the other. This is compared to the pattern observed for a tube closed on both ends. The effect observed when adding a mouthpiece is demonstrated, as is the effect when adding a bell. Finally the resonance patterns associated with a number of brass instruments will be demonstrated.
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