Finite-Amplitude Waves in Imperfect Cavities.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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Finite-amplitude standing waves in air at ambient temperatures contained within a detunable, rigid-walled rectangular cavity were experimentally investigated. The pressure waveforms resulting from excitations in the vicinity of the resonances of the 100 and 010 modes were analyzed for harmonic content at three different cavity configurations. Similarly, waveforms of the 110 and 210 modes were analyzed for four different cavity configurations. These results were compared to the predictions of a theory of Coppens and Sanders wherein the resonance frequencies and quality factors of all modes were experimentally determined from infinitesimal-amplitude measurements. Modified author abstract