Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Evaluation of the Impact of Noise Metrics on Tiltrotor Aircraft Design
Author: NASA Technical Memorandum
Author: Proceedings of NOISE-CON ...
Author: Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 872
Book Description
Evaluation of Noise Problems Anticipated with Future VTOL Aircraft
Author: John N. ColePublisher:
ISBN:
Category : Vertically rising aircraft
Languages : en
Pages : 24
Book Description
The potential noise problems anticipated with future VTOL aircraft are analyzed and discussed in general terms, and a brief review of the basic principles of noise generation of various types of propulsion systems proposed for VTOL is included. Primary consideration is given to the noise environments produced in areas adjacent to VTOL sites, since they could cause the most serious noise problem limiting the usefulness of VTOL aircraft. Contours of perceived noise levels are compared for different takeoff and landing profiles of 3-4 passenger, 60 passenger, and 25 ton-lift-crane VTOL aircraft. Criteria and methods for assessing the response of communities to noise from V-port operations are discussed along with the problem of detection of military VTOL aircraft by means of noise. Recommendations are given on the requirements for future research on these noise problems with emphasis on the need for considering noise as an integral part of the design, selection, and test of VTOL aircraft.
Government Reports Announcements & Index
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 528
Book Description
Handbook of Aircraft Noise Metrics
Author: Ricarda L. BennettPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 228
Book Description
Information is presented on 22 noise metrics that are associated with the measurement and prediction of the effects of aircraft noise. Some of the instantaneous frequency weighted sound level measures, such as A-weighted sound level, are used to provide multiple assessment of the aircraft noise level. Other multiple event metrics, such as day-night average sound level, were designed to relate sound levels measured over a period of time to subjective responses in an effort to determine compatible land uses and aid in community planning. The various measures are divided into: (1) instantaneous sound level metrics; (2) duration corrected single event metrics; (3) multiple event metrics; and (4) speech communication metrics. The scope of each measure is examined in terms of its: definition, purpose, background, relationship to other measures, calculation method, example, equipment, references, and standards.
Noise/news International
Author: Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 724
Book Description
Federal Aircraft Noise Research, Development and Demonstration Programs: FY73-FY75
Author: Interagency Aircraft Noise Research PanelPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 232
Book Description
Author: