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An acoustical analysis of waveline flute tube joints

Lind, Michael and Mayer, Alexander 

The object of this paper is the acoustical research of the Waveline Flute. For an overall length reduction of this special children instrument, an omega-shaped tube-joint instead of a straight tube is placed between the flute's head and the main tube. For this analysis the flute is alternately combined with four joint prototypes varying in bore. These different flute setups are compared using two measurement methods. The distinctions in intonation are determined by using an adapted Brass-Instrument-Analysis-System (BIAS). For a sound comparison an artificial embouchure system has been developed. High-speed video recordings of the emerging jet supported the design. The results of the obtained data indicate distinctive differences in the acoustical behaviour in terms of intonation, sound and response.