Abstract
The internal spectrum of a Helmholtz resonator excited by an air jet was studied as a function of jet speed for a variety of jet parameters. Special attention was given to the relation between jet speed and amplitude of the Helmholtz mode, which shows a pattern of characteristic ‘‘domains’’ first reported by Khosropour and Millet [J. Acoust. Soc. Am. 88, 1211–1221 (1990)]. The effects of variation of air-jet length on major features of these domains were studied. The deduced behavior of the air jet was compared with previous models, in particular that of Fletcher and Thwaites [Acustica 42, 323–334 (1979)]. Good agreement with the predictions of this model was discovered except at high jet flow rates.
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