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Saturday, July 25, 2020 | History

2 edition of Helicopter noise measurements found in the catalog.

Helicopter noise measurements

Harold C. True

Helicopter noise measurements

data report.

by Harold C. True

  • 83 Want to read
  • 11 Currently reading

Published by Dept. of Transportation, Federal Aviation Administration, Systems Research and Development Service, for sale by the National Technical Information Service in Washington, Springfield, Va .
Written in English

    Subjects:
  • Helicopters -- Noise.

  • Edition Notes

    Issued Apr. 1977.

    SeriesReport - Federal Aviation Administration, Systems Research and Development Service ; FAA-RD-77-57
    ContributionsUnited States. Federal Aviation Administration. Systems Research and Development Service.
    The Physical Object
    Pagination2 v. (v, 797 p.) :
    Number of Pages797
    ID Numbers
    Open LibraryOL15215138M

    helicopter operations are carried out on densely urbanized areas. Often these areas have significant constraints and obstacles, particularly in terms of noise pollution. These constraints make the approach/takeoff maneuvers very complicated. The theme of the environmental sustainability of the rotorcraft is strongly felt in. This helicopter appears to be intermediate in size between the Kmax and Vertol (see table 1 of Messingerova and Tajnos ). A model of the 90 dBA noise level contour around the Mil Mi-8 helicopter during yarding activities is about feet (50 meters) from the source.

    The measure requires the FAA to evaluate and revise existing helicopter routes to reduce noise impacts on residential areas and landmarks, such as the Hollywood Bowl, the Hollywood sign and. The purpose of this test program was to provide a data base for a possible helicopter noise certification rule. Only the measured data is presented. The eight helicopters tested during this Helicopter Noise Test Program constituted a wide range of gross weights and included participation from several helicopter manufacturers. The helicopter models used in this test program were the Hughes C.

      WASHINGTON, D.C. - Today, tucked in the many pages of the successful Aviation Investment and Reform spending bill (H.R. ), language authored by Congresswoman Carolyn B. Maloney (D-NY) to address public complaints regarding helicopter noise, traffic, and safety issues, passed in the US House of Representatives. The Aviation spending bill passed The FAA conducted a noise monitoring program of helicopter operations at the Lakefront Airport in New Orleans, Louisiana. The purpose was to obtain noise measurements from helicopter operations in an urban environment. During this monitoring program the FAA concentrated solely on helicopter approaches to Lakefront Airport. The noise data was collected and classified as survey type data, .


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Helicopter noise measurements by Harold C. True Download PDF EPUB FB2

Helicopter Noise Measurements Data Report. Volume I. Helicopter Models: Hughes C. Hughes C, Bell G. Bell L [Harold C. True] on *FREE* shipping on qualifying offers. Helicopter Noise Measurements Data Report.

Volume I. Helicopter Models: Hughes C. Hughes C, Bell G. Bell LAuthor: Harold C. True. Helicopter Noise Measurements Data Report. Volume II. Helicopter Models: Bell (UH-1N), Sikorsky S (SH-3A), Sikorsky S 'Skycrane' (CH- 54B), Boeing Vertol 'Chinook' (CHC) [Harold C.

True] on *FREE* shipping on qualifying offers. Helicopter noise measurements. Washington: Dept. of Transportation, Federal Aviation Administration, Systems Research and Development Service ; Springfield, Va.: For sale by the National Technical Information Service, noise measurements were made in steady-state longitudinal and steady turning flight, and during selected Helicopter noise measurements book maneuvers.

Special instrumentation, including direct measurement of the helicopter’s longitudinal tip-path-plane (TPP) angle, Differential Global Positioning System (DGPS) and Inertial. The Army Installation Compatible Use Zone (ICUZ) Program seeks to safeguard Army Installation operational capability. As part of ICUZ, helicopter noise is assessed using a computerized model developed by the U.S.

Air Force and modified by the U.S. Army Construction Engineering Research Laboratory (USA-CERL) for rotary-wing aircraft use.

D.C.-area lawmakers are pushing a measure that would create a centralized system to track complaints about helicopter noise in the region similar to ones used to collect information about airplane. The helicopter models used in this test program were the Hughes C, Hughes C, Bell G, Bell L, Bell (UH-1N), Sikorsky S (SH-3A), Sikorsky S 'Skycrane' (CHB), and Boeing Vertol 'Chinook' CHC.

Volume I contains the measured noise levels obtained from the first four helicopters while Volume II contains the data from the remaining four.

The second data set consists of ground noise measurements of the Bell B3 helicopter captured at Moffett Field, CA, in (Ref. These data are used to demonstrate the ability of the.

helicopter noise below the “10 dB down” point is clear to the LDN or LAeq metrics – give a realistic measure of both the source level and public response, implying that any increase in the sound associated with BVI, HSI, TRI and tail rotor noise is accounted for in full by metrics which take into account the duration.

helicopter. This paper presents the results of measurements of noise generated by helicopter SAH "Gazelle" at full throttle in the work on the land and take-off phase. The level of noise generated by helicopter type SAH "Gazelle" was compared to the levels of noise generated by the helicopters Robinson R44 Clipper and Bell B.

harmonic noise from broadband noise and thus helping improve the understanding and identification of helicopter harmonic noise sources.

Perhaps a more common and direct way to measure he-licopter noise is to use one or more microphones mounted to the ground and measure the radiated noise as the helicopter flies over the microphone or microphone.

Section H General. This appendix prescribes noise requirements for helicopters specified under §including: (a) The conditions under which helicopter noise certification tests under Part H must be conducted and the measurement procedures that must be used under § to measure helicopter noise during each test; (b) The procedures which must be used under § to correct.

Hypothesis 2: Main rotor impulsive noise controls the annoyance of helicopter noise (and hence requires an impulsive noise â correctionâ to A-weighted measurements).

A strong correlation between the prevalence of high annoyance and (A-weighted) DNL values was observed in only one of the three surveys in the interviewing area. TRB's Airport Cooperative Research Program (ACRP) Synthesis Helicopter Noise Information for Airports and Communities examines the results of a literature review and survey of ten airports to summarize the impact of outreach, helicopter noise management programs, technology, and abatement procedures in managing helicopter noise.

DTIC ADA Helicopter Noise Measurements Data Report. Volume I. Helicopter Models: Hughes C. Hughes C, Bell G. Bell L Item Preview. Helicopter Noise Measurements Data Report. Volume II. Helicopter Models: Bell (UH-1N), Sikorsky S (SH-3A), Sikorsky S 'Skycrane' (CHB), Boeing Vertol 'Chinook' (CHC).

Get this from a library. Rotary-wing aircraft noise measurements: analysis of variations and proposed measurement standard. [Paul Schomer; Construction Engineering Research Laboratory (U.S.:. "A new 1,page reference book, "Handbook of Noise and Vibration Control," intended to be the definitive source on noise and vibration control for engineers, scientists, and researchers.

The new reference book addresses a range of topics in acoustics and vibration, focusing on industrial needs.". DTIC ADA Helicopter Noise Measurements Data Report.

Volume II. Helicopter Models: Bell (UH-1N), Sikorsky S (SH-3A), Sikorsky S 'Skycrane' (CH- 54B), Boeing Vertol 'Chinook' (CHC) by Defense Technical Information Center. vibration levles in army helicopters-- final report measurement recommendations and data 6.

performing org. report number. author(s) john c. johnson and david b. priser 8. contract or grant number(a) i. performing organization name an-d address program element, project, task. The noise measurement campaigns performed during this research program enabled to develop a big experimental database, which will be useful for the new sound-proofing developments.

This paragraph gives a partial assessment of the results obtained, with a comparison of results obtained on a serial aircraft and on the demonstrator helicopter. Since the main vibration excitations on the helicopter units are mechanical and aerodynamical, the generated noise in operational conditions can be distinguished in aerodynamic-borne and mechanic-borne noise ().Concerning the aerodynamical noise, it contributes to both discrete frequency and broadband aerodynamic noise generation through several distinct noise mechanisms: .from acousticl'ropagation to environmental impact 9f helicopter noise.

This report is the sixth in a series of seven documenting the FAA helicopter noise measurement program conducted at Dulles International Airport during the summer of The S test program involved the acquistion of detailed acoustic&S,