Investigation of sound pressure near toneholes of a model pipe
* Presenting author
Abstract:
Whereas sound radiation from geometrically simple instruments such as a flue organ pipe or trumpet can often be approximated by basic sound sources such as monopoles, dipoles, plane waves or pistons, more complicated musical instruments exhibit directivity patterns that are rather complex. However, a superposition of basic sources would create equally complex patterns and help to understand the sound generation and radiation process. This poster demonstrates some sound pressure measurements on basic tubes with tone holes that evaluate the validity of plane wave and point source approximations for sound propagation within and outside the tubes that were used for the development of a new model for musical instrument directivity. The measurements indicate frequency-dependent losses inside the tubes, as well as attenuation and interference effects outside of the tubes due to the position and orientation of openings.