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

1–20 of 320 hits
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    5.56/7.62MM Weapons Comparative Evaluation, OH-6A Helicopter

    J. R. Wing / R. S. Holasek / V. L. Kiekmann | NTIS | 1971
    panel and gun-mount vibration levels, cockpit gun-noise levels, and gun-gas levels created by weapons firing. Only minor differences were noted ...
    Keywords: Vibration , Combat noise

    A comprehensive analytical model of rotorcraft aerodynamics and dynamics. Part 1: Analysis development

    Johnson, W. | NTRS | 1980
    noise; helicopter vibration and gust response; flight dynamics and handling qualities; and system aeroelastic stability. The analysis is ...
    Publisher: NASA National Aeronautics and Space Administration

    A Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics. Part 1: Analysis Development

    W. Johnson | NTIS | 1980
    noise; helicopter vibration and gust response; flight dynamics and handling qualities; and system aeroelastic stability. The analysis is ...
    Publisher: National Aeronautics and Space Administration, Moffett Field, CA. Ames Research Center

    A Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics. Part 3: Program Manual

    W. Johnson | NTIS | 1980
    to calculate rotor performance, loads, and noise; the helicopter vibration and gust response; the flight dynamics and handling qualities; and ...
    Publisher: National Aeronautics and Space Administration, Moffett Field, CA. Ames Research Center
    Keywords: Aircraft noise , Vibration

    A comprehensive analytical model of rotorcraft aerodynamics and dynamics. Part 3: Program manual

    Johnson, W. | NTRS | 1980
    to calculate rotor performance, loads, and noise; the helicopter vibration and gust response; the flight dynamics and handling qualities; and ...
    Publisher: NASA National Aeronautics and Space Administration

    A Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics. Part I. Analysis Development

    W. Johnson | NTIS | 1980
    calculate rotor performance, loads, and noise; helicopter vibration and gust response; flight dynamics and handling qualities; and system ...
    Publisher: National Aeronautics and Space Administration, Moffett Field, CA. Ames Research Center
    Keywords: Aircraft noise , Vibration

    A Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics. Part III. Program Manual

    W. Johnson | NTIS | 1980
    to calculate rotor performance, loads, and noise; the helicopter vibration and gust response; the flight dynamics and handling qualities; and ...
    Publisher: National Aeronautics and Space Administration, Moffett Field, CA. Ames Research Center
    Keywords: Aircraft noise , Vibration

    A Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics. Part II. User's Manual

    W. Johnson | NTIS | 1980
    rotor performance, loads, and noise; the helicopter vibration and gust response; the flight dynamics and handling qualities; and the system ...
    Publisher: National Aeronautics and Space Administration, Moffett Field, CA. Ames Research Center
    Keywords: Aircraft noise , Vibration

    Acoustically Tailored Composite Rotorcraft Fuselage Panels

    Hambric S. / Shepherd M. / Koudela K. et al. | NTIS | 2015
    frequencies between 1 and 4 kHz where gear meshing noise from the transmission has the most impact on speech intelligibility. The roof section, framed ...
    Keywords: Noise reduction , Structural vibration

    Acoustics Research of Propulsion Systems

    X. Gao / J. Houston | NTIS | 2014
    used in the prediction of the internal vibration responses of the vehicle and components. Present liftoff vehicle acoustic environment ...
    Publisher: National Aeronautics and Space Administration, Huntsville, AL. George C. Marshall Space Flight Center.
    Keywords: NOISE SPECTRA , VIBRATION TESTS

    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

    Actuator placement for active sound and vibration control

    NTIS | 1997
    Control Problems' and 'Quelling Cabin Noise in Turboprop Aircraft via Active Control.' The conference presentations covered various aspects of ...
    Publisher: College of William and Mary, Williamsburg, VA
    Keywords: Noise Pollution & Control , Aircraft noise , Noise reduction , Vibration damping

    [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

    Adaptive Rotor Blade Concepts -Direct Twist and Camber Variation-

    A. Bueter / U. C. Ehlert / D. Sachau et al. | NTIS | 2001
    Applying adaptronics to helicopters has a high potential to significantly suppress noise, reduce vibration and increase the overall ...
    Keywords: Test and evaluation , Vibration , Aircraft noise

    Advanced Dual-Shaft Electric Propulsion System Technology Development Program: DSEP Annual Report 3

    I. Kalns | NTIS | 1987
    TB-1 vehicle, the TB-1 vehicle tests to date, new design of some powertrain subsystems for the second vehicle---the NVH (noise, vibration ...

    Advancing State-of-the-Art Unsteady, Multidisciplinary Rotorcraft Simulations

    M. Potsdam / M. V. Fulton / H. Yeo et al. | NTIS | 2010
    investigated, and performance, aerodynamic and structural loads, vibration, noise prediction and flow physics mechanisms are shown. The rotor model ...
    Publisher: Army Aviation Research and Technology Activity, Moffett Field, CA. Aeroflightdynamics Directorate

    Aerial Very Heavy Lift Concepts for the 1990 Army. Volume III. Academic and Industrial Presentations

    NTIS | 1969
    to approximately 50-60 tons. Shaft-driven and tip-driven helicopter concepts were given major consideration. Power-plant and transmission ...
    Keywords: Vibration , Noise

    Aeroacoustic Research in the Netherlands Related to Aircraft Development

    W. B. Dewolf / S. L. Sarin | NTIS | 1985
    For jet noise reduction the feasibility of a lined ejector nozzle for the Fokker F28 aircraft was investigated by scale model measurements ...
    Keywords: Aircraft noise , Noise reduction

    Aeroacoustics of Space Vehicles

    J. Panda | NTIS | 2014
    mitigate the ignition pressure waves and rocket plume generated noise during the early part of the liftoff. Recently we have used large microphone ...
    Publisher: National Aeronautics and Space Administration, Moffett Field, CA. Ames Research Center.
    Keywords: Noise reduction

    Aerodynamics and Acoustics of Propellers, Conference Proceedings of the Fluid Dynamics Symposium Held at Toronto, Canada on 1-4 October 1984

    NTIS | 1985
    In-flight Near-field Propeller Noise Generation and Transmission; Propeller Aircraft Cabin Vibration and Noise-excitation Sources and Paths ...
    Publisher: Advisory Group for Aerospace Research and Development, Neuilly-sur-Seine (France)
    Keywords: Noise Pollution & Control , Propeller noise , Noise , Noise reduction , Aerodynamic noise , Vibration