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1–20 von 239 Ergebnissen
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    NASA Jet Noise Research

    B. Henderson | NTIS | 2012
    Schlagwörter: Noise Pollution & Control

      NASA Jet Noise Research

      B. Henderson | NTIS | 2016
      Schlagwörter: Noise reduction , Noise prediction (aircraft) , Jet aircraft noise , Aerodynamic noise , Surface noise interactions

    Mapping Heavy Vehicle Noise Source Heights for Highway Noise Analysis

    P. R. Donavan / C. J. Janello | NTIS | 2017
    Schlagwörter: Noise Pollution & Control , Noise pollution , Noise sources , Traffic noise levels , Transportation Noise Model (TNM) acoustical code

    Rural Traffic Noise Prediction - An Approximation

    D. G. Harland | NTIS | 1978
    Schlagwörter: Noise Pollution & Control , Noise pollution

    Jet Noise Prediction Comparisons with Scale Model Tests and Learjet Flyover Data

    B. Henderson / D. Huff / J. Berton | NTIS | 2020
    Schlagwörter: Aerodynamic noise , Effective perceived noise levels , Jet aircraft noise , Noise generators , Noise prediction , Noise reduction

    Airframe Self-Noise: Four Years of Research

    J. C. Hardin | NTIS | 1976
    Schlagwörter: Noise Pollution & Control , Aircraft noise , Noise reduction , Noise pollution

    Interior Noise Reduction in a Large Civil Helicopter

    J. T. Howlett / S. A. Clevenson / J. A. Rypf et al. | NTIS | 1977
    Schlagwörter: Noise Pollution & Control , Noise reduction , Aircraft noise , Noise pollution

    Prediction of Aerodynamic and Wheel/Rail Noise Generated by High-Speed Trains

    W. F. King | NTIS | 1977
    Schlagwörter: Noise Pollution & Control , Aerodynamic noise , Noise measurement , Noise pollution , Noise threshold

    PIV Measurements of a Low-noise Top-mounted Propulsion Installation for a Supersonic Airliner

    J. Bridges / M. P. Wernet | NTIS | 2019
    Schlagwörter: Aerodynamic noise , Jet aircraft noise , Noise generators , Noise prediction

    The Effect of Airplane Noise on the Inhabitants of Areas Near Okecie Airport in Warsaw

    Z. Koszarny / S. Maziarka / W. Szata | NTIS | 1981
    Schlagwörter: Noise Pollution & Control , Aircraft noise , Noise pollution , Effective perceived noise levels , Noise tolerance

    Verkeersgeluid Gezoabsorbeerd (Traffic Noise)

    NTIS | 1997
    Schlagwörter: Noise reduction , Traffic noise , Noise Pollution & Control , Noise pollution control

    Airframe Noise Reduction Status and Plans

    M. R. Khorrami | NTIS | 2011
    Schlagwörter: Noise Pollution & Control , Aerodynamic noise , Aircraft noise , Noise reduction

    Compact, Lightweight, Ceramic Matrix Composite Based Acoustic Liners for Reducing Subsonic Jet Aircraft Engine Noise

    J. D. Kiser / C. J. Miller / L. S. Hultgren et al. | NTIS | 2013
    Schlagwörter: Noise reduction , Jet aircraft noise , Engine noise

    Measurement and Characterization of Helicopter Noise at Different Altitudes

    M. E. Watts / E. Greenwood / J. Stephenson | NTIS | 2016
    Schlagwörter: Aircraft noise , Noise generators

    Helicopter Non-Unique Trim Strategies for Blade-Vortex Interaction (BVI) Noise Reduction

    C. Malpica / E. Greenwood / B. W. Sim | NTIS | 2016
    Schlagwörter: Noise reduction

    Investigation of Noise Reduction for the 3BB Nozzle with a Pylon Using External Flaps

    K. B. M. Q. Zaman | NTIS | 2008
    Schlagwörter: Noise reduction , Noise Pollution & Control , Jet aircraft noise

    Aeroacoustic Validation of Installed Low Noise Propulsion for NASA's N+2 Supersonic Airliner

    J. Bridges | NTIS | 2018
    Schlagwörter: Low noise , Jet aircraft noise , Noise prediction

    Flight-Test Measurement of the Noise Reduction of a Jet Transport Delayed Flap Approach Procedure

    J. D. Foster / P. L. Lasagna | NTIS | 1976
    Schlagwörter: Noise Pollution & Control , Noise measurement , Noise reduction , Noise pollution

    Simulation of Rotorcraft Fly-In Noise

    S. A. Rizzi / A. Christian | NTIS | 2015
    Schlagwörter: Aircraft noise , Noise propagation , Noise generators

    Evaluation of Aerodynamic Tools for Predicting UAM Vehicle Acoustics: Best Practices to Date

    N. Schatzman / L. Weist / D. Shirazi | NTIS | 2022
    Schlagwörter: Noise