Abstract
The acoustical characteristics of a single side branch resonator in a duct with flow have been studied. These studies include measurement of reflection and transmission coefficients as a function of frequency and flow velocity, investigation of conditions for flow excitation of the resonator, and the acoustic response of the resonator to an external sound field under conditions of self-oscillation. These response characteristics are compared with the results of an earlier experiment involving a moving resonator cavity exposed to an external sound field. The experimental results are compared with the theoretical analysis of the problem. [This work was supported in part by the U. S. Navy (Office of Naval Research) under Contract N00014-67-A-0204-0019.]
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