Standing waves in a flute Free

Standing wave patterns for pressure were calculated and measured for two alternate A6 fingerings on a flute. For a fingering with the D♯ key open the calculated pressure distribution agreed well with a similar result from Coltman [J. Acoust. Soc. Am. 65, 499–506 (1979)] and with probe tube measurements made on the instrument when excited sinusoidally at resonance. For a fingering with the D♯ key closed the agreement among pressure distributions was much poorer. These results will be discussed in terms of the sensitivity of impedance matching in the open hole part of the tube as a function of frequency. [Work supported in part by Australian‐American Educational Foundation.]