scholarly journals Comparison of the Aircraft Noise Calculation Programs sonAIR, FLULA2 and AEDT with Noise Measurements of Single Flights

Aerospace ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 388
Author(s):  
Jonas Meister ◽  
Stefan Schalcher ◽  
Jean-Marc Wunderli ◽  
David Jäger ◽  
Christoph Zellmann ◽  
...  
Keyword(s):  
Best Practice ◽  
Noise Exposure ◽  
Radar Data ◽  
Aircraft Noise ◽  
Full Potential ◽  
Noise Measurements ◽  
Close Range ◽  
Mean Differences ◽  
Configuration Information ◽  
Better Than

As aircraft noise affects large areas around airports, noise exposure calculations need to be highly accurate. In this study, we compare noise exposure measurements with calculations of several thousand single flights at Zurich and Geneva airports, Switzerland, of three aircraft noise calculation programs: sonAIR, a next-generation aircraft noise calculation program, and the two current best-practice programs FLULA2 and AEDT. For one part of the flights, we had access to flight data recorder (FDR) data, which contain flight configuration information that sonAIR can account for. For the other part, only radar data without flight configuration information were available. Overall, all three programs show good results, with mean differences between calculations and measurements smaller than ±0.5 dB in the close range of the airports. sonAIR performs clearly better than the two best-practice programs if FDR data are available. However, in situations without FDR data (reduced set of input data), sonAIR cannot exploit its full potential and performs similarly well as FLULA2 and AEDT. In conclusion, all three programs are well suited to determine averaged noise metrics resulting from complex scenarios consisting of many flights (e.g., yearly air operations), while sonAIR is additionally capable to highly accurately reproduce single flights in greater detail.

scholarly journals Study on Aircraft Noise Around Tribhuvan International Airport, Kathmandu, Nepal

2015 ◽  
Vol 15 (1) ◽  
pp. 139-144
Author(s):  
Mohan K. Bhattarai ◽  
B. K. Sapkota
Keyword(s):  
Noise Level ◽  
Background Noise ◽  
Noise Exposure ◽  
Aircraft Noise ◽  
Primary Data ◽  
Control Measurement ◽  
International Airport ◽  
North East ◽  
Noise Measurements ◽  
C 30

Present work was carried out to collect primary data from the field with the help of noise meter and thus spatial anddiurnal variation of background and aircraft noise level was analyzed. Seventeen sampling sites were chosennearby Tribhuwan International Airport (TIA) and air route of aircraft flyover. Noise measurements were carried outunder normal atmospheric environmental condition at temperature ranges from 25°C-30°C excluding rainy andwindy days. Among the sampling sites, the Equivalent Continuous Noise Level (LAeq) of background noise measuredmaximum at Balkumari (73.2 dBA) and minimum at Datidol (49.2 dBA). Noise meter was allowed to record aircraftnoise level when aircraft produced noise greater than background noise level and recorded until it reduced tobackground noise level. The maximum value of aircraft noise level, (LAeq) measured at Gothatar (101.5 dBA) whichlies north east from the TIA and at the same height as the airport ground and minimum at Datidol (63.5 dBA).Toanalyse the spatial variation of aircraft noise of different sampling sites, contour map was plotted with the help oforigin software. The LAeq of more than 60 percent sampling sites fall under the severe noise exposure class (> 75dBA) which causes substantial hearing loss. Implementation of noise control measurement and public awarenessare recommended to control adverse effect of noise pollution.DOI: http://dx.doi.org/10.3126/njst.v15i1.12031Nepal Journal of Science and TechnologyVol. 15, No.1 (2014) 139-144

scholarly journals Aircraft Noise and its Effects on Blood Pressure and Heart Rate at Mehrabad Airport Employees

2021 ◽  
Author(s):  
Yaser Khorshidi Behzadi ◽  
Mohammad Ranjbarian ◽  
Soheila Khodakarim
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Noise Exposure ◽  
Aircraft Noise ◽  
Control Group ◽  
Time Duration ◽  
Before And After ◽  
Long Time ◽  
Mean Differences ◽  
Control Study

Background: Sound is an inevitable part of everyday life these days. Hypertension is the most significant preventible risk of immature death all around the world. The main purpose of this study is to answer this question: Does aircraft noise affect blood pressure and heart rate? Methods: To achieve this objective, 100 personnel from the airport were selected. Additionally, 100 personnel were selected for the control group. In this case-control study the B&K dosimeter  model 4444 was used to record noise in a long time duration (8 hours) Blood pressure and heart rates were measured before and after their shift and during their work shift by connecting a dosimeter device to their body and recording noise exposure. SPSS V.22 software was used for statistical analysis. Results: Analyses showed that the average noise intensity in the experimental group was 87.84 ± 2.76, and in the control group, it was 70.01 ± 4.01's. Compared with the control group, mean differences between systolic (P <0/001) and diastolic blood pressure (P=0.047) was significant, while the mean differences in heart rate after the shift not have a significant (P> 0.05). Conclusions: research indicates that unacceptable noise could be a hazardous agent for hypertension. It is suggested that monitoring blood pressure, training workers, and periodic examination to be practiced to decrease blood pressure

Aircraft Noise Levels, Annoyance and General Health of Residents of Communities contiguous to a Major Airport in Lagos State

2020 ◽  
Vol 8 (4) ◽  
pp. 47-59
Author(s):  
Iheanyichukwu M. Elechi
Keyword(s):  
Health Status ◽  
General Health ◽  
Noise Exposure ◽  
Aircraft Noise ◽  
Poor Health ◽  
Noise Levels ◽  
General Health Status ◽  
Lagos State ◽  
Distant Location ◽  
Self Reported Health Status

The purpose of this study was to investigate the relationship between the aircraft noise exposure, annoyance reactions and health status of the residents living within the vicinity of the Murtala Muhammed International Airport (MMA) in Lagos state, Nigeria. Aircraft noise monitoring was conducted in five locations within the vicinity (0-5Km) of MMA, and a sixth distant location (14km away). Levels of aircraft noise for all five locations within the vicinity of the airport exceeded the EPA Victoria threshold of 75 dB LAmax for the residential area (outdoor). A survey on annoyance induced by aircraft noise exposure and general health status was conducted on 450 local residents in the study locations using the International Commission on Biological Effect of Noise question and a single question that has been applied in Dutch national health care surveys since 1983 on self-reported general health status respectively. Percentage of residents within the vicinity of MMA that were highly annoyed (%HA) exceeded 15% guideline limit stipulated by Federal Interagency Committee on Urban Noise while 14.5% reported poor health status. There was a significant association between the annoyance reactions and aircraft noise levels in the study locations while the association between self-reported health status and aircraft noise levels was not significant. Taken together, the residents within the vicinity of the airport are exposed to aircraft noise levels above permissible limit which may be associated with high annoyance reaction but may not be associated with poor health rating. Evidence-based aircraft noise related policies by government are advocated.

The Multiple-Vortex Structure of the El Reno, Oklahoma, Tornado on 31 May 2013

2018 ◽  
Vol 146 (8) ◽  
pp. 2483-2502 ◽  
Author(s):  
Howard B. Bluestein ◽  
Kyle J. Thiem ◽  
Jeffrey C. Snyder ◽  
Jana B. Houser
Keyword(s):  
Doppler Radar ◽  
Radar Data ◽  
Rapid Scan ◽  
X Band ◽  
Close Range ◽  
Formation And Evolution ◽  
Using Data ◽  
Secondary Vortices ◽  
The Right ◽  
Gust Front

Abstract This study documents the formation and evolution of secondary vortices associated within a large, violent tornado in Oklahoma based on data from a close-range, mobile, polarimetric, rapid-scan, X-band Doppler radar. Secondary vortices were tracked relative to the parent circulation using data collected every 2 s. It was found that most long-lived vortices (those that could be tracked for ≥15 s) formed within the radius of maximum wind (RMW), mainly in the left-rear quadrant (with respect to parent tornado motion), passing around the center of the parent tornado and dissipating closer to the center in the right-forward and left-forward quadrants. Some secondary vortices persisted for at least 1 min. When a Burgers–Rott vortex is fit to the Doppler radar data, and the vortex is assumed to be axisymmetric, the secondary vortices propagated slowly against the mean azimuthal flow; if the vortex is not assumed to be axisymmetric as a result of a strong rear-flank gust front on one side of it, then the secondary vortices moved along approximately with the wind.

scholarly journals Aircraft Noise Distribution as a Fairness Dilemma—A Review of Aircraft Noise through the Lens of Social Justice Research

2021 ◽  
Vol 18 (14) ◽  
pp. 7399
Author(s):  
Dominik Hauptvogel ◽  
Susanne Bartels ◽  
Dirk Schreckenberg ◽  
Tobias Rothmund
Keyword(s):  
Social Justice ◽  
Noise Exposure ◽  
Cost Benefit ◽  
Aircraft Noise ◽  
Noise Distribution ◽  
Justice Research ◽  
Fairness Perceptions ◽  
Noise Annoyance ◽  
Social Justice Research ◽  
The Relationship

Aircraft noise exposure is a health risk and there is evidence that noise annoyance partly mediates the association between noise exposure and stress-related health risks. Thus, approaches to reduce annoyance may be beneficial for health. Annoyance is influenced by manifold non-acoustic factors and perceiving a fair and trustful relationship between the airport and its residents may be one of them. The distribution of aircraft noise exposure can be regarded as a fairness dilemma: while residents living near an airport may seem to have some advantages, the majority of residents living under certain flight routes or in their immediate proximity suffer from the disadvantages of the airport, especially the noise. Moreover, a dilemma exists between the airport’s beneficial economic impact for a region and the physical and psychological integrity of residents. Aircraft noise exposure through the lens of social justice research can help to improve our understanding of noise annoyance. Research indicates that the fairness perceptions of the parties involved can be enhanced by (a) improving individual cost–benefit ratios, (b) providing a fair procedure for deciding upon the noise distribution, and (c) implementing fair social interaction with residents. Based on the review of evidence from social justice research, we derive recommendations on how fairness aspects can be integrated into aircraft noise management with the purpose of improving the relationship between the airport and its residents, to reduce annoyance, and to enhance the acceptance of local aviation and the airport as a neighbor.

scholarly journals Case Study in a Working Environment Highlighting the Divergence between Sound Level and Workers’ Perception towards Noise

2020 ◽  
Vol 17 (17) ◽  
pp. 6122
Author(s):  
Chun-Yip Hon ◽  
Illia Tchernikov ◽  
Craig Fairclough ◽  
Alberto Behar
Keyword(s):  
Noise Exposure ◽  
Health And Safety ◽  
Sound Level ◽  
Working Environment ◽  
Noise Levels ◽  
Hearing Conservation ◽  
Attitudes And Perceptions ◽  
Noise Measurements ◽  
Survey Responses ◽  
Excessive Noise

Excessive noise levels are a prevalent issue in food processing operations and, although there have been numerous studies on occupational noise, no single study has used a concurrent mixed-methods approach. Employing this study design allows for an understanding of the level of convergence (similarity) between measured noise levels and workers’ attitudes and perceptions towards noise. This, in turn, allows for the identification of potential challenges with respect to the implementation of hearing conservation efforts. In this study, spot noise measurements were collected using a sound level meter. One-on-one interviews were conducted with workers to determine attitudes and perceptions towards noise in their workplaces. Subsequently, the results of the noise measurements (quantitative data) were integrated with the survey responses (qualitative data) to identify convergence. The majority of the noise measurements were found to exceed 85 dBA—the criterion mandated by the local occupational health and safety legislation. Although all study participants felt that it was noisy in the workplace, a large proportion of respondents indicated that the noise was not bothersome. With workers’ perception being contradictory to the measured noise levels, it is a challenge to implement hearing conservation measures unless changes are made to raise the awareness of the risks associated with excessive noise exposure.

scholarly journals Picture-Frustration Test to Assess Environmental Attitudes of Residents Exposed to Aircraft Noise from Hanoi Noi Bai International Airport

2021 ◽  
Vol 13 (4) ◽  
pp. 2016
Author(s):  
Thulan Nguyen ◽  
Sonoko Kuwano ◽  
Ichiro Yamada ◽  
Takashi Yano ◽  
Makoto Morinaga
Keyword(s):  
Natural Environment ◽  
Noise Exposure ◽  
Aircraft Noise ◽  
Living Environment ◽  
Transport Systems ◽  
International Airport ◽  
Acoustic Surveys ◽  
Rural Sites ◽  
Residents Attitudes ◽  
Different Levels

Expanding transport systems for life convenience and preserving the natural environment are essential but conflicting human activities. The operational expansion after the opening of a new terminal building at Hanoi Noi Bai International Airport was followed by changes in aircraft noise exposure. A series of socio-acoustic surveys were conducted around the airport, revealing different levels of noise annoyance responses in the surveyed sites. To clarify this discrepancy and to explore people’s true feelings, the Picture-Frustration test was conducted to assess attitudes toward the airport, aircraft noise, living environment, and awareness of environmental protection in the communities around the airport. A total of 321 responses were obtained. The results showed a significant variation in attitudes toward the airport and natural environment among residents in different areas. Urban residents preferred natural environment more than those living in rural and mixed sites, who desired harmony between nature and life convenience. Residents in rural sites raised more complaints about aircraft noise effects on sleep than those in the other sites. Factors of occupations and gardening activities did not affect residents’ attitudes toward the airport. The attitudes of the participants varied depending on the exposure noise levels. It was suggested that using multiple questioning methods is necessary to certify the true opinions and aspirations of people living in the project area and ensure sustainable development.

U.S. Federal Aviation Administration Neighborhood Environmental Survey: Study Motivation and Results

2021 ◽  
Vol 263 (1) ◽  
pp. 5815-5827
Author(s):  
Sean Doyle ◽  
Donald Scata ◽  
James Hileman
Keyword(s):  
Noise Exposure ◽  
Survey Methodology ◽  
Research Effort ◽  
Research Priorities ◽  
Federal Aviation Administration ◽  
The United States ◽  
Aircraft Noise ◽  
Survey Study ◽  
Environmental Survey ◽  
Additional Information

As part of the agency's broader noise research program, the Federal Aviation Administration (FAA) has undertaken a multi-year research effort to quantify the impacts of aircraft noise exposure on communities around commercial service airports in the United States (U.S.). The overall goal of the study was to produce an updated and nationally representative civil aircraft dose-response curve; providing the relationship between annoyance and aircraft noise exposure around U.S. airport communities. To meet this goal, the FAA sponsored a research team to help design and conduct a national survey, known as the Neighborhood Environmental Survey (NES). By assessing the results of the NES through both internal review and input from public comment, the FAA seeks to better inform its noise research priorities and noise policies. This paper will outline the FAA's motivation to conduct the NES as well as how its findings will help inform ongoing work to address aircraft noise concerns. Additional information describing the noise methodology and survey methodology are provided in companion papers.

Daily fluctuations in aircraft noise exposure around civil airports and military airfields in Japan

2021 ◽  
Vol 263 (1) ◽  
pp. 5154-5160
Author(s):  
Koichi Makino ◽  
Naoaki Shinohara
Keyword(s):  
Standard Deviation ◽  
Noise Exposure ◽  
Quality Standards ◽  
Sound Level ◽  
Aircraft Noise ◽  
The Other ◽  
Yearly Average ◽  
Daily Total ◽  
Airline Flight ◽  
Monitoring Stations

In Japan, yearly average of (day-evening-night sound level) as cumulative noise index has been adopted in national noise guideline of "Environmental Quality Standards for Aircraft Noise." Daily flight movements at civil airports are almost stable because of scheduled airline flight. On the other, daily total flight movements at military airfields greatly change day to day because of training flights, etc. Thus, noise exposure around the airport may change significantly from day to day due to change of flight movement. This paper shows examples of fluctuations, frequency distribution and deviation of daily using aircraft noise monitoring data around civil airports and military airfields. In the case of civil airports, standard deviation of daily was less than 5 dB at the monitoring stations where the yearly average of were about 55 dB or more. However, the standard deviation of daily increased 10 dB or more in some cases at points where yearly average of less than 55 dB. Furthermore, in the case of military airfields, the standard deviation of daily were 5 dB or more for all monitoring stations.

The Subjective Basis for Aircraft Noise Limitation

1967 ◽  
Vol 71 (678) ◽  
pp. 396-400
Author(s):  
D. W. Robinson
Keyword(s):  
Noise Exposure ◽  
Aircraft Noise ◽  
Test Results ◽  
Subjective Measurement ◽  
Noise Limitation

SummaryA brief review is given of the kinds of objective and subjective measurement required for systematic regulation of the aircraft noise around an airport, based on a maximum permissible noise exposure criterion. Some subjective factors are discussed and illustrated by test results.

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