Topic
Aircraft noise
About: Aircraft noise is a research topic. Over the lifetime, 3051 publications have been published within this topic receiving 32039 citations.
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04 Jun 1980
TL;DR: In this article, a statistical theory of finite-amplitude noise propagation has been used to explain anomalously low attenuation for frequencies in the range 5-10 kHz, and the results show encouraging agreement with the anomalous data.
Abstract: Carefully controlled tests of aircraft noise propagation have shown instances of anomalously low attenuation (deficiencies in excess of 10 dB over 500 m) for frequencies in the range 5-10 kHz. These results have been explained with the aid of a statistical theory of finite-amplitude noise propagation. Detailed analysis of recordings from one test has provided a direct check on the nonlinear theory. Results from several different tests have been incorporated in a statistical model, which allows the nonlinear distortion of aircraft noise spectra to be estimated as a function of distance, level, spectrum shape, and atmospheric conditions. Preliminary results show encouraging agreement with the anomalous data.
26 citations
TL;DR: Findings in the present study confirm findings in the small number of available studies to date suggesting adverse health effects associated with aircraft noise annoyance and noise sensitivity and indicate possible modifier effects in the relationship between aircraft noise levels and the risk of hypertension.
26 citations
Journal Article•
TL;DR: Results are consistent with the hypothesis that noise exposure produces physiological symptoms, but that expectations regarding future noise levels also contribute to the physiological impact of noise, which may be reduced by addressing psychosocial factors related to noise reaction.
Abstract: We examine the possibility that physiological effects of noise may result not only from noise exposure per se, but also from people's beliefs about the noise. Due to widely publicised changes to the runway configuration at Sydney Airport, aircraft noise levels in nearby areas were expected to either increase, decrease or remain the same. As part of the Sydney Airport Health Study, residents in each of these 3 expected-change areas (N=1015) completed a structured interview which included indices of noise reaction (including annoyance) and physical and mental health, prior to the anticipated changes. Concurrent (pre-change) measures of aircraft noise levels were taken. Self-reported physiological/health effects differed across areas with the same aircraft noise level consistently with differences in psychological reaction across these areas. Expected change in noise level added to the level of self-reported physiological symptoms predicted by noise level in regression analyses. Dose-response functions differed across the expected-change areas. These results are consistent with the hypothesis that noise exposure produces physiological symptoms, but that expectations regarding future noise levels also contribute to the physiological impact of noise, which may be reduced by addressing psychosocial factors related to noise reaction.
26 citations
Journal Article•
TL;DR: A model and a minimization method are developed to provide flight path optimums reducing aircraft noise in the vicinity of airports and generates flight paths minimizing aircraft noise levels.
Abstract: The objective of this paper is to develop a model and a minimization method to provide flight path optimums reducing aircraft noise in the vicinity of airports. Optimization algorithm has solved a complex optimal control problem, and generates flight paths minimizing aircraft noise levels. Operational and safety constraints have been considered and their limits satisfied. Results are here presented and discussed.
26 citations
TL;DR: The Rotorcraft Noise Model (RNM) as mentioned in this paper is an aircraft noise impact modeling computer program being developed for NASA-Langley Research Center which calculates sound levels at receiver positions either on a uniform grid or at specific defined locations.
Abstract: The Rotorcraft Noise Model (RNM) is an aircraft noise impact modeling computer program being developed for NASA-Langley Research Center which calculates sound levels at receiver positions either on a uniform grid or at specific defined locations. The basic computational model calculates a variety of metrics. Acoustic properties of the noise source are defined by two sets of sound pressure hemispheres, each hemisphere being centered on a noise source of the aircraft. One set of sound hemispheres provides the broadband data in the form of one-third octave band sound levels. The other set of sound hemispheres provides narrowband data in the form of pure-tone sound pressure levels and phase. Noise contours on the ground are output graphically or in tabular format, and are suitable for inclusion in Environmental Impact Statements or Environmental Assessments.
26 citations