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Showing 1 to 20 of 27 for “"traffic noise"”.
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Modeling Of Atmospheric Refraction Effects On Traffic Noise Propagation
Traffic noise has been shown to have negative effects on exposed persons in the communities along highways. Noise from transportation systems is considered a nuisance in the U.S. and the government agencies require a determination of noise impacts for federally funded projects. There are several …
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Application Of Absorptive Treatments On Traffic Noise Barriers In Florida
… feature in the Federal Highway Administration Traffic Noise Model (FHWA TNM), which is based on RAYVERB was used to explore the effects of multiple reflections due to single and parallel barriers and the use of absorptive treatment. Database was developed from the data collected from previous …
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Road Traffic Noise - Factors modifying its relation to annoyance and cardiovascular disease
Traffic noise causes annoyance and sleep disturbance and has been linked with several other adverse effects on life quality and health, including increased risk of hypertension and myocardial infarction. Conservative estimates assume that at least one million healthy life years are lost every year …
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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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Road traffic noise barrier design : measurements and models concerning multiple-walls and augmented earth mounds
… programme is concerned with the design of road traffic noise barriers, in particular, the use of multiple-walls on the ground and on top of earth mound type barriers.</p> <p>As part of this research, a comprehensive up-to-date review of the research carried out on noise barriers was undertaken. …
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LOCALIZATION ABILITIES OF PERSONAL AUDIO DEVICE USERS
… devices are frequently used in loud background noises (such as street noise). In such situations, listeners increase volume levels in order to maintain an adequate music-to-noise ratio. This study assessed the preferred listening levels and the ability to detect and spatially localize an …
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NOISE MEASUREMENTS AND EVALUATION OF SOUND SOURCES OF ROAD VEHICLES
This thesis investigates traffic noise pollution's health/environmental impacts, motivated by high-density urban experiences worldwide It reviews noise sources, effects, mitigation strategies, and compares ICE (Volkswagen SUV) and EV (Renault) noise at 10, 30, 50 km/h via SoundCam 2.0 acoustic …
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Application of cepstrum techniques and a guard tube to the measurement of the normal incident sound power absorption coefficient of road surfaces in-situ
… coefficient of road surfaces in-situ. Road traffic noise has been identified as the greatest noise pollutant in the industrialised world with the tyre/road interaction being the major source of noise for traffic speeds in excess of 50 km/hr. Open pore bitumen asphalt material has been found …
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The noise awareness among hospital community due to traffic and construction noise in Hospital Raja Permaisuri Bainun
… is needed. This research investigates the traffic noise and construction noise and the perception it has on the community of Hospital Raja Permaisuri Bainun, Ipoh. The selected study area was delimited by traffic noise on the Raja Ashman Shah Road and construction on the hospital block. A …
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Barrier Effects Of Roads And Traffic On Animal Occurrence, Space Use, And Movements
… not mutually exclusive mechanisms that include traffic, edge, and gap avoidance. We used an endangered forest obligate, the Mount Graham red squirrel (Tamiasciurus hudsonicus grahamensis), as our study organism to assess effects of traffic noise on animal occurrence and demonstrated that traffic …
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URBAN SEISMIC AMBIENT NOISE ANALYSIS: INNOVATIONS AND APPLICATIONS
Seismic ambient noise generated by human activities provides an opportunity to monitor aboveground human activities without intruding on privacy. However, extracting specific signals from noisy seismic noise is challenging. Seismic ambient noise also contains information about the underground …
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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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Feasibility of Seismic Monitoring to Identify Avalanche Activity: Snoqualmie Pass, WA
… possible to record avalanche activity over the traffic noise of the interstate and that avalanche activity can be distinguished from other seismic sources. Similarities in the seismic signals with previous research show distinct characteristics associated with avalanches, however, no further …
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Dealing With Uncertainty in Engineering and Management Practices
… in five fields. These fields are: (1) traffic noise impact assessment, (2) hydraulic reliability assessment and reliability based optimization, (3) binary linear programming, (4) real-time multiple source water blending optimization, and (5) process control of an industrial rotary kiln. …
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Development of graphical user interface tools for optimal fluid management in shale oil and gas operations
… by minimizing impacts such as road damage, truck traffic, noise, air pollution, water pollution and landscape disturbance. Interactive management tools allow operators to increase water reuse and minimize the environmental risks of hydraulic fracturing. This research entails developing graphical …
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Hippies in the Park: Yosemite and the Counterculture in the Sixties American West
… a refuge from urban life, visitors instead found traffic, noise, and air pollution. Worst of all, they found an influx of hippie visitors who irritated park rangers and visitors alike. That irritation boiled over on July 4, 1970, when hippies and park authorities clashed in Stoneman Meadow. As a …
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Sonic Crystal Noise Barriers
An alternative road traffic noise barrier using an array of periodically arranged vertical cylinders known as a Sonic Crystal (SC) is investigated. As a result of multiple (Bragg) scattering, SCs exhibit a selective sound attenuation in frequency bands called band gaps or stop bands related to the …
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