Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Noise Abatement"”.
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Modeling and managing separation for noise abatement arrival procedures
Aircraft noise is a significant concern to communities near airports, and therefore a constraint to the growth of aviation. Advanced noise abatement approach and arrival procedures have been shown in previous studies and in limited implementation to be a cost effective means of achieving near- and …
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Design of aircraft noise abatement approach procedures for near-term implementation
Advanced aircraft noise abatement approach procedures -- characterized by decelerating, continuous descent approaches using idle thrust, and enabled by flight guidance technologies such as GPS and FMS -- have been shown to reduce operational aircraft noise on communities surrounding airports. …
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A systems analysis methodology for developing single event noise abatement procedures
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Noise propagation model for the design of weather specific noise abatement procedures
This thesis presents an aircraft noise prediction simulation that incorporates actual weather in flight dynamics and noise propagation. The rapid prototyping simulation environment NOIse SIMulator (NOISIM) includes a sound propagation model based on a ray tracing algorithm that incorporates …
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A Data-Driven Approach to Departure and Arrival Noise Abatement Flight Procedure Development
An aircraft noise modeling framework is presented and used to perform a data-driven exploration of factors correlating with measured aircraft community noise and a model-based validation of the variables found to have the greatest noise impact. Aggregate departure and arrival noise and flight …
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Real-time trajectory optimization and air traffic control simulation for noise abatement approach procedures
Aircraft noise is a major obstacle to the growth of aviation. This thesis presents an adaptive onboard real-time optimization algorithm and an Air Traffic Control simulation model that can minimize the aircraft approach noise and meet air traffic control targets and restrictions. The adaptive …
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Biology-Inspired Approach for Communal Behavior in Massively Deployed Sensor Networks
… to provide significant progress on the noise abatement problem for jet aircraft. Using local information and actions, optimal impedance values for an acoustic liner are determined <em>in situ</em> providing the basis for an adaptive noise abatement system that provides superior noise …
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Development of an income-based hedonic monetization model for the assessment of aviation-related noise impacts
… to the environment, which include aircraft noise, air quality degradation, and climate change. This thesis presents a new method to quantify the monetary impacts of aviation-related noise, which are of particular interest to policymakers and other aviation stakeholders for the evaluation of …
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A Comparative Study of Insertion Loss of Traffic Noise Barriers in Georgia
<p>In this paper, three types of traffic noise barriers, interlocking steel panels, precast concrete panels, and Paragon panel 23-T, were evaluated in terms of insertion loss. Field test was conducted for the noise barriers recently installed as part of the Northwest Express Project in Georgia. The …
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MITIGATION OF GEAR MESH-FREQUENCY VIBRATIONS UTILIZING A HYDROSTATIC BEARING
<p>In the current environment of noise abatement, high frequency noises are especially objectionable. For gear drives, high frequency noises are symptoms of gear mesh-frequency vibrations which are ever-present due to the imperfect conjugate action between the gears. These vibrations are then …
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A weather related causal analysis on consolidated delay at Newark Liberty International Airport
… policy with Ground Delay Program (GDP) and Noise Abatement Procedures (NAP). These policies can be profound and far reaching for airlines, in terms of operating procedures and fuel cost implications. These findings can further alter the balance between efficiency, public safety and airline …
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Analysis of approach stability and challenges in operational implementation of RNP approach procedures
… avoiding flight over populated areas for noise abatement, etc.) at the airport level. Among the various proposed benefits of RNP approaches, this study analyzed potential safety benefits related to improvements in approach stability. In total, 11,062 individual approaches at four airports …
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An evaluation of noise reduction strategies at large commercial airports in the United States: A policy analysis and framework classification
<p>Noise pollution from aircraft, specifically in the vicinity of airports as aircraft takeoff and land, is a problem that has been shown to have negative impacts on the welfare of humans, animals, and the surrounding environment. The problem may only become worse as air travel increases for cargo …
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Listening to urban sound: A mixed-method approach for understanding human mobility, individual sound exposure, and psychological well-being
… health. Urbanization brings about ever-growing noise problems in cities. Exposure to high levels of sound is associated with health risks involving annoyance, disturbance, stress, cognitive performance impairment, hearing loss, and cardiovascular diseases. Despite great investment in noise …
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Deep Learning Prediction Models for Runway Configuration Selection and Taxi Times Based on Surface Weather
… as instrument approach procedures for runways, noise abatement procedures, arrival and departure demand, and coordination of ATC with neighboring airport facilities. The research problem of this study investigated whether runway configuration selection and taxi out times at airports can be …
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Implementing and testing a panel-based method for modeling acoustic scattering from CFD input
<p>Exposure of sailors to high levels of noise in the aircraft carrier deck environment is a problem that has serious human and economic consequences. A variety of approaches to quieting exhausting jets from high-performance aircraft are undergoing development. However, testing of noise abatement …
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On the Use of Surface Porosity to Reduce Wake-Stator Interaction Noise
… and rotor-strut interactions, linked to noise and fatigue failure in turbomachinery environments. A computational study was designed to assess the potential of Passive Porosity Technology as a mechanism for alleviating interaction effects and radiated noise by reducing the fluctuating …
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Tranquillity by design - Architectural and landscape interventions to improve the soundscape quality in urban areas exposed to aircraft noise
The noise emissions from aircraft negatively impact the quality of life for those in areas around airports. Excess noise levels can cause stress-related complaints, leading to adverse health effects. Although newer aircraft are significantly quieter than older models, aircraft noise pollution …
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Essays on the economics of pollution prevention
… monitoring is scheduled. Chapter 2 studies noise pollution and health effects of wind farms. Current technology uses wind turbines’ blade aerodynamics to convert wind energy to electricity. This process generates significant low-frequency noise that reportedly results in residents’ sleep …
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Aviation environmental policy and issues of timescale
… impacts to climate, air quality, and community noise. Furthermore, effects in these domains occur over different temporal and spatial scales and with different aleatoric and epistemic uncertainty. Thus, robust, fast, and flexible tools that value these impacts on a common scale such as monetized …