Influence of wall vibrations on the sound of brass wind instruments.
The results of an experimental and theoretical investigation of the influence of wall vibrations on the sound of brass wind instruments are presented. Measurements of the transmission function and input impedance of a trumpet, with the bell both heavily damped and freely vibrating, are shown to be consistent with a theory that assumes that the internal pressure causes an oscillation of the diameter of the pipe enclosing the air column. These effects are shown to be most significant in sections where there are flaring walls, which explains why damping these vibrations in cylindrical pipes normally produces no measurable effects.
Institute of Musical Acoustics, University of Music and Performing Arts, Anton von Webern Platz 1, A-1030 Vienna, Austria.
Wilfried
W
Kausel
Daniel W
DW
Zietlow
Thomas R
TR
Moore
D000162:Acoustics; D001108:Architecture; D005160:Facility Design and Construction; D006801:Humans; D008962:Models, Theoretical; D009146:Music; D014732:Vibration