Assessment of ground effects on aircraft noise the T-38A flight experiment by William L Willshire

Cover of: Assessment of ground effects on aircraft noise | William L Willshire

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch in Washington, D.C, [Springfield, Va. : For sale by the National Technical Information Service] .

Written in English

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  • Airplanes -- Noise -- Testing

Edition Notes

Book details

StatementWilliam L. Willshire, Jr
SeriesNASA technical paper -- 1747
ContributionsUnited States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, Langley Research Center
The Physical Object
Pagination125 p. :
Number of Pages125
ID Numbers
Open LibraryOL14932762M

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Aircraft noise has adverse impacts on passengers, airport staff and people living near airports, it thus limits the capacity of regional and international airports throughout the world. Reducing perceived noise of aircraft involves reduction of noise at source, along the propagation path and at the receiver.

Summary. Aircraft noise has adverse impacts on passengers, airport staff and people living near airports, it thus limits the capacity of regional and international airports throughout the world.

Reducing perceived noise of aircraft involves reduction of noise at source, along the propagation path and at. the ground effects on aircraft noise, Putnam gave concise descriptions of the ray acoustic analysis of sound reflections by surfaces, of sound attenuation over ground according to the Rudnick theory, and of practical problems which.

are encountered in outdoor acoustic Size: 2MB. A flight experiment was conducted to investigate air-to-ground propagation of sound Assessment of ground effects on aircraft noise book grazing incidence.

A turbojet-powered aircraft was flown at low altitudes over the ends of two microphone arrays. An eight-microphone array was positioned along a m concrete runway. The ground effects were largest in the frequency range of to Hz and were found to be dependent on incidence angle and slant range.

Ground effects measured for angles of incidence greater than 10 deg to 15 deg were near by: 2. FUNDAMENTALS OF AIRCRAFT NOISE A variety of noise metrics are used to assess airport noise impacts in different ways.

Noise metrics are used to describe individual noise events (such as a single operation of an aircraft taking off overhead) or groups of events (such as the cumulative effect of numerous aircraft operations, the collection of.

Methods of Assessment of Aircraft Noise Nigel Burton SECTION 2 – LITERATURE REVIEW AND RESEARCH Aircraft Noise in the United Kingdom The Wilson Committee Report Over forty years ago, in Julythe British Parliament was presented with the findings of the Committee for the Problem of Noise in their final report.1File Size: 1MB.

Aircraft noise consists of two major types of sound events: aircraft takeoffs and landings, and engine maintenance operations. The former can be described as intermittent sounds and the latter as continuous.

Noise levels from flight operations exceeding background noise typically occur beneathFile Size: KB. transportation noise, in particular aircraft noise and the resulting impacts on various health endpoints. These included cardiovascular disease, night-time effects on sleep disturbance, children’s cognition, psychological effects, performance and annoyance.

Aircraft noise and health effects is a rapidly growing area of research worldwide,File Size: KB. CHAPTER 6 AIRCRAFT NOISE ANALYSIS 6‐2 Spokane International Airport Master Plan (March ) The strength, or loudness, of a sound wave is measured using decibels on a logarithmic scale. The range of audibility of a human ear is 0 dB (threshold of hearing) to dB (pain begins).File Size: 2MB.

[7,8]. This variability is assumed to be due to the effect of the variable atmosphere and the variations of the emitted noise at the source. Aircraft noise depends on several parameters such as the engine settings, aircraft speed and flight configuration, which are not fully taken into account by the NPD tables.

evidence for aircraft noise effects on cardiovascular health, sleep disturbance, annoyance, psychological well- being, and effects on children’s cognition and learning, as well as briefly discussing guidelines for environment noise exposure.

Data on the acoustic impedance of ground surfaces were used to estimate the influence of ground reflection on levels of aircraft noise measured at m.

It is shown that the effect on the perceived noise level can be determined by the pressure reflection coefficient at a frequency of 2 kHz, removing the requirement for information on acoustic. Mitigating noise on the ground – given that even factoring in advances in manufacturing and utilising of noise-minimising operational strategies, it is unlikely that aircraft noise can be reduced to a level that annoys no one, this chapter looks at tactics including insulation, glazing and sound barriers to mitigate aircraft noise.

aircraft noise. The recommendations contained within this assessment are therefore intended to feed into the reform process and assist in the development of more effective communications and greater accountability on aircraft noise issues.

[Show full abstract] engine concept, a noise assessment of the overall aircraft noise as received on the ground is essential, i.e., a so called system noise assessment. For this study a DLR & TU. Get this from a library.

Assessment of ground effects on aricraft noise: the TA flight experiment. [William L Willshire; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.; Langley Research Center.].

Table 1 lists the varying impacts of aircraft noise on people in residential areas for different day–night average noise exposure behavioral and physiological impacts from long- and short-term exposure to aircraft noise have been studied extensively.

Behavioral impacts include general annoyance, sleep disturbance, and disruption of work performance and learning, while Cited by: The Balanced Approach to Aircraft Noise Management. Assessment of noise situation • Limited engine ground running.

Operating Restrictions Defined as any noise-related action that limits or reduces an aircraft’s access to an airport Not to be used as a first resort, onlyFile Size: 1MB. Noise Assessment Modeling Analysis.

Share on (INM), Versionto support the aircraft noise assessments presented in Chapters 4 and 5 and Appendix F of the O’Hare Modernization Draft Environmental Impact Statement (DEIS). The INM is a computer program used to evaluate the noise exposure effects associated with aircraft operations in an.

Workshop on Aircraft Noise Impacts Research and preparing this Summary Report in HUD Noise Assessment Guidelines, BBN ReportAugust aircraft noise became judged more by its effects on the public than on public reactions to aircraft noise. It. Major environmental assessment issues can be effects: Environmental Assessments (EAs), Findings of No Significant Impact (FONSI), airport-related noise, including ground support equipment and vehicular traffic, will also be scrutinized.

Larger aircraft with larger engines, regional jets, and hyper- and supersonic aircraft will. An Assessment of Commuter Aircraft Noise Impact Sanford FideU, Karl S. Pearsons, Laura Silvati, and Matthew Sneddon BBN Acoustic Technologies, Canoga Park, California Contract NAS June National Aeronautics and Space Administration Langley Research Center Hampton, Virginia TRB’s Airport Cooperative Research Program (ACRP) Synthesis 9: Effects of Aircraft Noise: Research Update on Select Topics includes an annotated bibliography and summary of new research on the effects of aircraft noise.

The report is designed to update and complement the U.S. Federal Aviation Administration’s Aviation Noise Effects report. Helicopter operations: the environmental impact and ground facilities.

of ground access to the facility and by incorporating the individual community's standards, fixed-wing aircraft noise around airports.

The presence of a heliport appears to create a levelFile Size: 1MB. Get this from a library. Predication of ground effects on aircraft noise. [S Paul Pao; Alan P Wenzel; Paul B Oncley; United States. National Aeronautics and Space Administration. Scientific and Technical Information Office.] -- A unified method is recommended for predicting ground effects on noise.

This method may be used in flyover noise predictions and in correcting static test-stand data to. The survey sample classified aircraft noise as the most objectionable source of noise (18, 19, e12): the higher the aircraft noise level, the greater was the annoyance (figure 4).

Figure 4 Proportion of persons exposed to serious aircraft noise annoyance as a factor of continuous daytime noise level (L eq, 16 h) calculated by the % rule (19).Cited by: Effects on sleep disturbance of changes in aircraft noise near three airports Article (PDF Available) in The Journal of the Acoustical Society of America (5 Pt 1) June with 93 Reads.

12 Helicopter Noise Modeling Integrated Noise Model (INM) version FAA requires use of this model for civil aviation noise analyses FAA requires modeling the annual-average day of operations to determine aircraft noise exposure – Annual operations ÷ days = Annual-average day UCSF modeled average and busy day with INM transports represents the average day.

There was no effect in females. Noise annoyance was linked to MI in males (for traffic noise at night, RR=) and females (for aircraft noise at night, RR=) and noise sensitivity was an increased risk in males (RR=).

The authors suggested that these gender differences might be due to difference in sex hormones, contraceptive use, different. Although individual aircraft have become some 75 % less noisy over the last 30 years, the growing amount of air traffic means that many EU citizens are still exposed to high noise levels.

In order to ensure the sustainability of aviation, measures targeting the noise impact will remain necessary at a number of important airports. The effects of road traffic and aircraft noise exposure on children's episodic memory: the RANCH Project.

Noise Hea – / [Google Scholar] Maxwell L. E., Evans G. The effects of noise on pre-school children's pre-reading skills. Cited by: The effect of flight paths and frequency of aircraft movements were analysed as potential contributors to the risk of accidents involving residential and industrial areas.

Aircraft Risk Assessment A probability analysis of military aircraft accidents within Australia and Super Hornet worldwide provided aFile Size: KB. Appendix A presents a detailed discussion of noise and its effects on people and the environment. An assessment of aircraft noise requires a general understanding of how sound is measured and how.

In the Ukraine, the equivalent level L Aeq is used for day and night time periods and maximum A-weighted sound levels L Amax are used for separate aircraft noise events. As recommended by ICAO effective perceived noise levels EPNL are used for evaluating the technical performance of aircraft.

It is well known that the magnitude of L Aeq correlates well with the effects of noise on any kind of Cited by: Excessive background noise in a classroom can originate from outside the building (aircraft and traffic noise, lawnmowers and leaf blowing) or from within the building (heating, ventilation, air-conditioning, plumbing systems, noise from adjacent classrooms or hallways, gymnasiums or music rooms) or noise from the students themselves.

Federal Interagency Committee on Aviation Noise Assessment of Tools for Modeling Aircraft Noise in the National Parks Gregg G. Fleming Kenneth J. Plotkin Christopher J. Roof Bruce J. Ikelheimer David A. Senzig Ma USDOT Research & Special Programs Administration John A.

Volpe National Transportation Systems Cente r. Lloyd George Acoustics. Reference:!Wdocx!. Page3. Table Building Site Acceptability Based on ANEF Zones &Building&Type& ANEF&Zone&of&Site&. The Environmental Noise Guidelines aim to support the legislation and policy-making process on local, national and international level.

The WHO guideline values are public health-oriented recommendations, based on scientific evidence of the health effects and on an assessment of achievable noise levels.

Benson noise assessment ARM v South Oxfordshire District Council 23 February 5 Paragraph 14 of the NPPF states that “At the heart of the National Planning Policy Framework is a presumption in favour of sustainable development, which should be seen as a goldenFile Size: 3MB.

Aircraft noise is noise pollution produced by an aircraft or its components, whether on the ground while parked such as auxiliary power units, while taxiing, on run-up from propeller and jet exhaust, during take off, underneath and lateral to departure and arrival paths, over-flying .Also, "noise education" should be part of the school curriculum; kids should know how to protect their ears from harm.

Children in schools bombarded by frequent aircraft noise don't learn to read as well as children in quiet schools do, say Cornell University researchers.2 REVIEW OF NOISE AND VIBRATION ASSESSMENT METHODS 3 Introduction 3 The Effects of Noise 3 Measurement of Noise 5 Prediction of Noise 10 Assessment of Noise 11 3 BEST AVAILABLE TECHNIQUES FOR NOISE CONTROL 16 Introduction 16 How Sound is Attenuated 16 Sound Attenuation Through Structures 16 Noise Control.

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