Results 281 to 290 of about 2,103,194 (320)
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The International Journal of Electrical Engineering & Education, 2021
Prediction of aerodynamic noise is the key technology for the internal weapon bay of supersonic aircraft. Nonlinear numerical simulation is proposed as a new method to analyze noise recently. The Non-Linear Acoustic Solver (NLAS) is employed to study the
Binqi Chen, Yiding Wang
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Prediction of aerodynamic noise is the key technology for the internal weapon bay of supersonic aircraft. Nonlinear numerical simulation is proposed as a new method to analyze noise recently. The Non-Linear Acoustic Solver (NLAS) is employed to study the
Binqi Chen, Yiding Wang
semanticscholar +1 more source
9th Propulsion Conference, 1973
Opportunities to reduce military aircraft noise without inhibiting mission capability are considered. Emphasis is placed on the need for a comprehensive military aircraft noise abatement program involving compatible land use in the vicinity of military airports, operational constraints, and procedures to reduce noise impact and source noise reduction ...
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Opportunities to reduce military aircraft noise without inhibiting mission capability are considered. Emphasis is placed on the need for a comprehensive military aircraft noise abatement program involving compatible land use in the vicinity of military airports, operational constraints, and procedures to reduce noise impact and source noise reduction ...
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AIRCRAFT APPROACH NOISE TRIALS
Inter-Noise 2022, 2023This article presents the results from a series of aircraft approach trials that were conducted with the aim to investigate noise reduction procedures within the boundaries of a normal ILS approach. The significant decline in air traffic at Stockholm Arlanda, that occurred during the pandemic meant that the empty airspace and the availability of ...
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Airframe Noise-The Next Aircraft Noise Barrier
Journal of Aircraft, 1974Progress in quieting the commercial aviation fleet has been achieved by reducing the noise generated by jet engines. Recent tests have indicated that noise produced by airflow over aircraft surfaces (lifting surfaces, landing gear, flaps, and cavities) is only 8 to 10 EPNdB below certification requirements for current aircraft and will likely be a ...
H. MORGAN, J. HARDIN
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Noise & Vibration Worldwide, 2003
Various noise measurement parameters/indices used to define aircraft and airport noise are explained. The noise zone limits used around airports in some countries are given. Noise prediction software can be used to generate noise contours around airports.
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Various noise measurement parameters/indices used to define aircraft and airport noise are explained. The noise zone limits used around airports in some countries are given. Noise prediction software can be used to generate noise contours around airports.
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Scaling aircraft noise perception
Journal of Sound and Vibration, 1971An experiment was undertaken to evaluate various methods for calculating the perceived level of aircraft flyover sound. One hundred and twenty recorded sounds of jets, turboprops, piston engined aircraft, and helicopters were compared in a paired comparison test.
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INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 2021
Several studies predict an increase up to 40% in traffic flights by the 2040. Airport noise control is a complicated procedure which creates an interesting blend of science, politics, and money. Accordingly, in many communities where airport noise is perceived as a significant problem, a noise control program is sometimes viewed as a continual process,
Francesca Remigi +3 more
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Several studies predict an increase up to 40% in traffic flights by the 2040. Airport noise control is a complicated procedure which creates an interesting blend of science, politics, and money. Accordingly, in many communities where airport noise is perceived as a significant problem, a noise control program is sometimes viewed as a continual process,
Francesca Remigi +3 more
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Aircraft magnetic noise sources
8th International Congress of the Brazilian Geophysical Society, 2003Aeromagnetic aircraft and data acquisition systems generate magnetic interference which can effect the quality of the data collected. Many people believe that traditional aircraft compensation, which models the permanent, induced, and eddy-current sources, can remove all of this interference.
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Physics Bulletin, 1972
Without wishing to detract from the merit of Prof J B Large's article on aircraft noise in the November 1971 issue of Physics Bulletin, we would like to draw attention to a potential danger arising from one of his recommendations. His first recommendation, to replace the existing NNI expression by a logarithmic form of the expression deserves support ...
K Williams, D N Hall
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Without wishing to detract from the merit of Prof J B Large's article on aircraft noise in the November 1971 issue of Physics Bulletin, we would like to draw attention to a potential danger arising from one of his recommendations. His first recommendation, to replace the existing NNI expression by a logarithmic form of the expression deserves support ...
K Williams, D N Hall
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1989
Aircraft Noise traces the origins of this problem to the introduction of the jet engine into the airline fleet in the late 1950s and describes the legal restrictions now placed on the industry. It explains the derivation of the special noise units and assessment scales now used around the world; noise exposure modeling and forecasting; the major ...
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Aircraft Noise traces the origins of this problem to the introduction of the jet engine into the airline fleet in the late 1950s and describes the legal restrictions now placed on the industry. It explains the derivation of the special noise units and assessment scales now used around the world; noise exposure modeling and forecasting; the major ...
openaire +1 more source