NASA Technical Reports Server (NTRS) : Noise pdf

NASA Technical Reports Server (NTRS) : Noise

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Description of the Book:

Noise-reduction measurements are presented for a stiffened and an unstiffened model of an airplane fuselage. The cylindrical models were tested in a reverberant-field noise environment over a frequency range from 20 Hz to 6 kHz. An unstiffened metal fuselage provided more noise reduction than a fuselage having the same sidewall weight divided between skin and stiffening stringers and ring frames. The addition of acoustic insulation to the models tended to smooth out the interior-noise spectrum by reducing or masking the noise associated with the structural response at some of the resonant frequencies

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 2/1/1984
• Year: 1984
• Book Topics/Themes: NASA Technical Reports Server (NTRS), AIRCRAFT MODELS, FUSELAGES, NOISE REDUCTION, CYLINDRICAL BODIES, RESONANT FREQUENCIES, STRINGERS, Willis, C. M., Mayes, W. H

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