Feb 11 1968

From The Space Library

Electric signals out of phase with jet engine noise could be introduced into exhaust flame and converted into sound waves to cancel out engine noise, according to United Technology Center scientist, Dr. A. G. Cattaneo. Idea, in principle, had been demonstrated by recent laboratory experiments in which acetylene torch flame converted elec­tric signals into sound with high fidelity. Evaluation of combustion ef­ficiency during rocket engine tests could be additional application. (Wilford, NYT, 2/11/68, 30)

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