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- W1512187818 abstract "The need for a dependable and controllable noise source and the consequent development of the Spinning Mode Synthesizer (SMS) is discussed. Configuration of the SMS incorporated into the flow duct facility is reported. Turbofan noise is composed of a series of fundamental acoustical modes, which are produced by acoustic drivers equispaced circumferentially around the flow duct. Pressure field is compared to an ideal result in an optimization algorithm, adjusting driver settings until system error is minimized. The following items are included: operating instructions, a detailed description of the system, and a user's guide to data acquisition packages available." @default.
- W1512187818 created "2016-06-24" @default.
- W1512187818 creator A5022461080 @default.
- W1512187818 date "1981-03-01" @default.
- W1512187818 modified "2023-09-26" @default.
- W1512187818 title "An operations manual for the Spinning Mode Synthesizer in the Langley Aircraft Noise Reduction Laboratory" @default.
- W1512187818 hasPublicationYear "1981" @default.
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