Synonyms were used for: Noise vibration,
Search without synonyms: title: Noise and Vibration; Noise and vibration, 2010

81–100 of 468 hits
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    [Actuator placement for active sound and vibration control]

    NTRS | 1997
    Control Problems" and "Quelling Cabin Noise in Turboprop Aircraft via Active Control." The conference presentations covered various aspects of ...
    Publisher: NASA National Aeronautics and Space Administration

    Vibration and Acoustic Environment of AH-1G Helicopter

    V. C. McIntosh / P. G. Bolds | NTIS | 1975
    Vibration and acoustic measurements were made on an AH-1G Helicopter equipped with 7.62 millimeter machine guns, a 40-millimeter grenade ...
    Keywords: Vibration , Noise(Sound) , Noise

    Low-Noise Rotorcraft Blades

    Brooks, Thomas F. | NTRS | 1994
    vibration and loading noise reduced by load-averaging effect of double-sweep planform. Aft-swept section provides balancing of aerodynamic and other ...
    Publisher: NASA National Aeronautics and Space Administration

    Sound and Vibration Measurements for Concorde Supersonic Transport and Subsonic Jet Aircraft

    J. H. Wiggins | NTIS | 1974
    The report summarizes an investigation of the sound and structural vibration levels resulting from operations of both supersonic (SST) and ...
    Keywords: Noise Pollution & Control , Jet aircraft noise , Noise pollution , Vibration , Noise reduction

    Aircraft noise-induced building vibrations

    Stephens, D. G. / Mayes, W. H. | NTRS | 1979
    The outdoor/indoor noise levels and associated vibration levels resulting from aircraft and nonaircraft events are recorded at 11 homesites ...
    Publisher: NASA National Aeronautics and Space Administration

    Oscillator With Low Phase Noise

    Kleinberg, Leonard L. | NTRS | 1987
    -amplifier configuration in which effects cause phase noise tend to cancel each other. Circuit includes two amplifiers with resonating elements, each ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Electronic Components And Circuits

    Low-Noise Spiral Bevel Gears

    Lewicki, David G. / Handschuh, Robert F. / Coy, John J. et al. | NTRS | 1994
    Modified spiral bevel gears that generate relatively little noise and vibration designed and fabricated for use in U.S. Army OH-58D ...
    Publisher: NASA National Aeronautics and Space Administration

    Directionality of Helicopter Noise and Its Exploitation

    M. V. Lowson | NTIS | 1996
    published in the Journal of Sound and Vibration. An extended version of the paper to be presented in the Journal of Sound Vibration, with the key ...
    Keywords: Aircraft noise , Vibration

    Particle-impact noise detector (PIND)

    Barr, R. J. / Jackson, D. E. / Leaf, W. D. et al. | NTRS | 1978
    Package, in page assembly, is subjected to low-frequency vibration, and noise generated by particle impacts is picked up by transducer ...
    Publisher: NASA National Aeronautics and Space Administration

    Airframe noise: A design and operating problem

    Hardin, J. C. | NTRS | 1976
    this noise source are evaluated in light of the comprehensive theory developed by Ffowcs Williams and Hawkings. Vibration of panels on the ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Air Transportation And Safety

    Assessment of Space Vehicle Aeroacoustic- Vibration Prediction, Design, and Testing

    C. M. Fuller / H. Himelblau / T. D. Scharton | NTIS | 1970
    Keywords: Aerodynamic noise , Structural vibration

    Improved Technique for Finding Vibration Parameters

    Andrew, L. V. / Park, C. C. | NTRS | 1986
    Filtering and sample manipulation reduce noise effects. Analysis technique improves extraction of vibrational frequencies and damping rates ...
    Publisher: NASA National Aeronautics and Space Administration

    Truck Noise III-A. Preliminary Noise Diagnosis of Freightliner Datum Truck-Tractor

    M. C. Kaye / W. N. Patterson / E. K. Bender | NTIS | 1973
    To determine present noise levels associated with a truck of the same class and performance characteristics as the quieted truck, tests ...
    Publisher: Office of the Secretary of Transportation, Washington, D.C. Office of Noise Abatement
    Keywords: Noise Pollution & Control , Noise(Sound) , Engine noise , Motor noise , Vibration isolators , Noise pollution

    Noise from High Speed Railway Operations

    J. G. Walker | NTIS | 1975
    railway noise are summarized and an assessment is made of the present day railway noise environment. Reasons are given for the acceptability of ...
    Publisher: Southampton Univ. (England). Inst. of Sound and Vibration Research
    Keywords: Noise Pollution & Control , Noise pollution

    Acoustic and vibration environments for laboratory experiments in space

    Rader, W. P. | NTRS | 1981
    The basic parameters of random noise and vibration are described, and typical environments for the launch phase and orbital operations are ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Spacecraft Design, Testing And Performance

    Evaluation of a Low-Noise Formate Spiral-Bevel Gear Set

    Lewicki, David g. / Woods, Ron L. / Litvin, Faydor L. et al. | NTRS | 2007
    and an improved-bearing-contact low-noise design). Noise, vibration, and tooth strain tests were performed. The Formate design showed a ...
    Publisher: NASA National Aeronautics and Space Administration

    Activities of the Institute of Sound and Vibration Research

    NTIS | 1972
    The activities of the Institute of Sound and Vibration Research at the University of Southampton for the year ending March 1972, are ...
    Publisher: Southampton Univ. (England). Inst. of Sound and Vibration Research
    Keywords: Vibration measurement

    Space-Station-Interior Noise-Analysis Program

    Stusnick, Eric | NTRS | 1988
    Intelligibility of speech evaluated for specified acoustical environments. Program makes systematic prediction of noise and vibration ...
    Publisher: NASA National Aeronautics and Space Administration

    Uses of Vibration in Helicopter Flying

    G. R. Hawkes / G. M. Katz / W. S. Ray | NTIS | 1973
    from noise and vibration cues. Time judgments of these cues were studied with findings such as follows: Noise and vibration are judged about ...
    Keywords: Vibration , Noise

    Measurement, analysis, and prediction of aircraft interior noise

    Howlett, J. T. / Williams, L. H. / Catherines, J. J. et al. | NTRS | 1976
    and laboratory studies for a light aircraft are presented. The laboratory data indicate that structural vibration is an efficient source of ...
    Publisher: NASA National Aeronautics and Space Administration