Noise-Reduction Measurements of Stiffened and Unstiffened Cylindrical Models of an Airplane Fuselage PDF Download
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Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781725615489 Category : Languages : en Pages : 32
Book Description
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. Willis, C. M. and Mayes, W. H. Langley Research Center NASA-TM-85716, L-15699, NAS 1.15:85716 RTOP 505-33-53-03...
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781725615489 Category : Languages : en Pages : 32
Book Description
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. Willis, C. M. and Mayes, W. H. Langley Research Center NASA-TM-85716, L-15699, NAS 1.15:85716 RTOP 505-33-53-03...
Author: National Aeronautics and Space Administration (NASA)
Author: Conrad M. Willis
Author: National Aeronautics and Space Administration (NASA)
Author: Conrad M. Willis
Author: Conrad M. Willis
Author: 
Author: Conrad M. Willis
Author: 
Author: 
Author: 
Author: Harvey H. Hubbard