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Wednesday, May 6, 2020 | History

2 edition of role of vibration and rattle in human response to helicopter noise found in the catalog.

role of vibration and rattle in human response to helicopter noise

Paul Schomer

role of vibration and rattle in human response to helicopter noise

by Paul Schomer

  • 123 Want to read
  • 17 Currently reading

Published by U.S. Army Corps of Engineers, Construction Engineering Research Laboratory, Available from the National Technical Information Service] in Champaign, Ill, [Springfield, VA .
Written in English

    Subjects:
  • Helicopters -- Noise.,
  • Vibration (Aeronautics),
  • Noise pollution.

  • Edition Notes

    Statementby Paul D. Schomer, Robert D. Neathammer.
    SeriesUSA-CERL technical report -- N-85/14., Technical report (Construction Engineering Research Laboratory) -- N-85/14.
    ContributionsNeathammer, R. D., Construction Engineering Research Laboratory.
    The Physical Object
    Pagination158 p. :
    Number of Pages158
    ID Numbers
    Open LibraryOL17563093M

    In the Netherlands, three cases have been reported of Chinook helicopters' rattle noise (low frequency sound) damaging solar panels. The Dutch defense ministry recognises this problem and the lawyer representing some of the victims says these may be the first cases (worldwide). of subjective response of communities to helicopter noise. Opportunities for improvements 1) The UK has world-leading expertise in the sound insulation of residences from helicopter noise. This expertise could be exploited by designers and planners with regard to future building developments in the vicinity of helicopter operations.

    helicopter sound that forms the stimulus should be examined. The physical noise must be measured and analyzed as a first step in assessing the human response to this noise source. 3. I,-Eise Source Mechanisms Helicopter noise principally emanates from three major sources: (I) main rotor or.   Engines, control surfaces, airflow, poor intercom systems are all potential sources of noise in the aviation environment. Even if the noise doesn't seem extreme, over a .

    Noise and vibration transmission in complex structures 1. Introduction The theories we discuss in this review have been motivated by very practical consider- ations. We shall be concerned with problems relating to the understanding of vibration in complex mechanical structures such as buildings, ships and aircraft, and the usual. L. Xu, in Recent Trends in Cold-Formed Steel Construction, Classification of human perceptibility to floor vibrations. Human perception of floor vibration is a combination of movement of the floor system, physical perception, and the psychological reaction to vibration. Occupants in different settings will be more sensitive to exactly the same vibration than others, depending on.


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Role of vibration and rattle in human response to helicopter noise by Paul Schomer Download PDF EPUB FB2

The Role of Vibration and Rattle in Human Response to Helicopter Noise by Paul D. Schomer Robert D. Neathammer Our understanding of community reacti to helicopter noise remains incomplete. A technique called "A-weighting" appears to produce realistic data outdoors and at modest noise levels, and the community response in terms of Size: 6MB.

While A‐weighting appears to work outdoors and at modest noise levels, and the community response in terms of percentage of population highly annoyed can be correlated with respect to the day/night average sound level (DNL) descriptor, questions remain as to the role of perceived building vibrations and rattle in human response to helicopter by: The role of perceived building vibrations and rattle in human response to helicopter noise (in terms of percentage of population highly annoyed) was studied using the A-weighting and C-weighting.

The role of perceived building vibrations and rattle in human response to helicopter noise (in terms of percentage of population highly annoyed) was studied using the A-weighting and C-weighting to assess response.

Test participants were placed in a wood-frame home, a mobile home, or outdoors. To answer these questions, this study examined the role of vibration and rattle in human response to helicopter noise.

Many volunteer subjects were tested under real noise conditions. The helicopter noise was generated by an Army UH-1H (Huey) helicopter.

The role of vibration and rattle in human response to helicopter noise. Champaign, Ill.: [Springfield, VA: U.S.

Army Corps of Engineers, Construction Engineering Research Laboratory ; Available from the National Technical Information Service] MLA Citation. Schomer, Paul. and Neathammer, R. and Construction Engineering Research Laboratory.

examine descriptors for helicopter noise and study the role of helicopter noise-induced vibration and rattle. The first phase of this program showed that if the helicopter noise induced high levels of window rattling, then A-weighting was inadequate and a large adjustment to the measurement (10 to 20 db) had to be : Paul D Schomer, Brian D Hoover, Lee R Wagner.

Journal of Sound and Vibration () 20 (3), HUMAN ASPECTS OF VIBRATION AND NOISE IN HELICOPTERS' C. JACKSON AND W. GRIMSTER Research Department, Westland Helicopters Limited, Yeovil, Somerset, England.

(Received 15 October ) A rumis given of the types and sources of helicopter by: 2. To answer these questions, this study examined the role of vibration and rattle in human response to helicopter noise. Many volunteer subjects were tested under real noise conditions.

on house vibration responses due to airborne noise excita- tion and to define the role of such vibrations in the problem of human perception of environmental noise. The building response data contained herein, are derived largely from air- craft noise, helicopter noise and sonic boom flyover tests.

Get this from a library. The role of vibration and rattle in human response to helicopter noise. [Paul Schomer; R D Neathammer; Construction Engineering Research Laboratory (U.S.: )]. This paper presents the main findings of a field survey conducted in the United Kingdom into the human response to vibration in residential environments.

The main aim of this study was to derive exposure-response relationships for annoyance due to vibration from environmental sources. The sources of vibration considered in this paper are railway and construction by:   "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.".

HUMAN RESPONSE TO ENVIRONMENTAL NOISE AND VIBRATION FROM FREIGHT AND PASSENGER RAILWAY TRAFFIC Calum SHARP Acoustics Research Centre School of Computing, Science and Engineering College of Science and Technology University of Salford, Salford, UK Submitted in Partial Ful lment of the Requirements of the Degree of Doctor of Philosophy, October An introduction to random vibration [by] J.

Robson; Principles of vibration and sound / Thomas D. Rossing, Neville H. Fletcher; Vibration of thick elastic and viscoelastic tubes / Ian D. Moore; The role of vibration and rattle in human response to helicopter noise [microform] / by Paul D. Schomer.

overall vibration transmitted to a human body in contact with the machine is made up of different frequencies of vi­ bration occurring simultaneously. This is an Important fact to take into consideration when measuring human vibration because the human body Is not equally sensitive to all fre­ quencies of vibration.

Book. TOC. Actions. Share. Noise and Vibration Control in Automotive Bodies. Author(s): Squeak and Rattle Control in Vehicle Body (Pages: ) Summary; PDF References; Request permissions; CHAPTER 9. Targets for Body Noise and Vibration (Pages: ) Summary; PDF References; Request permissions; Free Access.

Index (Pages:   This book meets the needs of those requiring knowledge of human response to vibration in order to make practical improvements to the physical working environment.

Written with the consultant, practitioner, researcher, and student in mind, the text is designed to be an educational tool, a reference, and a stimulus for new ideas for the next Cited by: Human Response to Vibration.

Scenic Acoustic and Vibration Engineering Ltd (SAVE) provide Human Response to Vibration assessments for the evaluation of human exposure to vibration in buildings (1 Hz to 80 Hz) in accordance with BS Structural vibration in buildings can be detected by the occupants and can affect them in many ways, including their quality of life and their working efficiency.

human response (Section ), and how vibration axes are defined (Section ). INTRODUCTION TO WAVE THEORY Vibration is mechanical movement that oscillates about a fixed (often a reference) point. It is a form of mechanical wave and, like all waves, it transfers energy but not matter.

Vibration needs a mechanical structure through which to Size: 3MB. Assessing Community Annoyance of Helicopter Noise.

Learning Objectives. At the end of this webinar, you will be able to: • Understand best practices for airport or heliports in managing helicopter noise • Understand how responses differ for helicopter noise and fixed-wing noise, along with the role .perception, and rattle noise has been targeted as one likely contributor to elevated annoy-ance to booms experienced indoors [16,56].

Background on Human Response to Rattles Human response to impulsive noises, such as sonic booms, heard indoors is affected by the generation of contact-induced rattle noise. Understanding this indoor human Cited by: 5.vibration based damage detection (e.g., Wavelet Transform and Wigner-Ville distribution) will be highlighted.

These vibration signal-processing methods play an important role in early identification of incipient damage that can later develop in a potential threat to the system functionality, and even a flight accident.

In aerospace.