human vibration Articles

  • Human emotional response to steering wheel vibration in automobiles

    This study investigates what form of correlation may exist between measures of the valence and the arousal dimensions of the human emotional response to steering wheel vibration and the vibration intensity metrics obtained by means of the unweighted and the frequency weighted root mean square (rms). A laboratory experiment was performed with 30 participants who were presented 17 acceleration time ...


    By Inderscience Publishers

  • VIBRATION NOISE & ITS IMPACT ON HUMAN HEALTH

    Vibrational Noise is one of the major Environmental problems in Industrial Plants. The Noise Study under taken in Chinese Unit no.4 of Thermal Power Station (TPS) Jamshoro. The level and Frequency characteristics of the prevailing Noise recorded in detail, at Basement Area Feed Pumps, Turbines, Boilers, F.D.F, I.D.F & Compressors, and found that the level of Noise is higher at Boiler House and ...


  • Measurement and bio–dynamic model development of seated human subjects exposed to low frequency vibration environment

    In this study, the effect of posture, vibration magnitude and frequency on seat–to–head (STH) and back support–to–head (BTH) transfer functions has been studied under vertical sinusoidal vibration. Twelve healthy male subjects participated in experimental work to measure vertical vibration transmitted to the occupants' heads in three representative postures (erect, ...


    By Inderscience Publishers

  • Vibro-acoustical comfort in cars at idle: human perception of simulated sounds and vibrations from 3- and 4-cylinder diesel engines

    A bench was used to reproduce the vertical vibrations of the seat, the vibrations of the steering wheel and the noise measured at the driver's ears of cars running at hot idle. In a first experiment, subjects were only submitted to seat vertical vibrations; it appeared that comfort could be described by rms values of signals, without using ISO-2631 weightings. In a second experiment, subjects ...


    By Inderscience Publishers

  • Nonlinear seat cushion and human body model

    This paper presents the nonlinear characteristics of typical automotive seat cushion structure. As discussed in an earlier paper by the authors (Pang et al., 2004), the experimental transfer functions between the seat butt and the seat track vary with changes in the excitation levels. Both the magnitudes and frequencies of the transfer functions shift to smaller values as the excitation ...


    By Inderscience Publishers

  • Consideration of human factors in investigations of structural failures

    Investigations of claimed structural failures often lead to conclusions based on structural factors including strength and serviceability. Typically, these conclusions are absolute, since they result from objective comparisons of results to limits prescribed by owners and/or governing agencies. Occasionally, however, the failure of a structure may be defined by human factors, which are more ...


    By Inderscience Publishers

  • Field measurements and assessment of vibration serviceability of as–built long–span concrete floor

    Vertical vibration serviceability of an as–built concrete floor, whose 41.55 m span is currently the longest in China, are investigated in this paper by field measurements and numerical analysis. A vibration monitoring system were designed and installed on the floor. Different types of human–induced excitation are simulated such as single person walking, multi–person walking at the same pace ...


    By Inderscience Publishers

  • Canarina CUSTIC software · noise and vibration modeling · introduction 6

    The frequency range of sound audible to humans is approximately between 20 and 20,000 Hz. The amplitude range of sound for humans has a lower limit of 0dB, called the threshold of hearing. Sound is technically at its upper limit at 194.09 dB. Sounds begin to do damage to ears at 85 dB and sounds above approximately 130 dB. ...

  • Minor construction measures that influences vibration in concrete floors from foot steps and electric motors

    Concrete floor constructions often suffer from high frequency vibrations. Humans aerobics workouts and various motors are sensitive to that kind of vibrations and it is of interest to find simple methods that reduce floor vibrations and thereby increase the comfort for habitants. Two steel framed concrete floors equipped with a vibration damping compound is used as a test object under laboratory ...


    By Inderscience Publishers

  • Development of small-sized flexible pneumatic valve using vibration motor and its application for wearable actuator

    Owing to the recent ageing and decreasing birth rate, providing nursing care to the elderly has become very crucial. As a result, it is necessary to develop wearable systems to aid in nursing care. To realise such a system, we require not only wearable soft actuators, but also a compact and flexible control valve. The purpose of our study is to develop a flexible, lightweight and compact control ...


    By Inderscience Publishers

  • JNIOSH - reproduction of multi-modal sensation

    The Company On 1 April 2006, the National Institute of Industrial Safety (NIIS) and the National Institute of Industrial Health (NIIH) were amalgamated into a single, administrative institute known as the National Institute of Occupational Safety and Health, Japan (JNIOSH). Of all research institutions under the Japanese Ministry of Health, Labour and Welfare, JNIOSH is one of the top ...

  • Blast wave characteristics and its influence with distance of measurement

    Extraction of locked-up coal pillars by opencast method and the presence of dwellings in proximity to excavation area lead to specialised drilling and blasting plan for safety of structures and humans. Introduction of improper bench layout, mismatched drilling equipment and blast geometry enhances discomfort for local inhabitants. Blast-induced vibration magnitude also shows poor attenuation rate ...


    By Inderscience Publishers

  • Environmental concerns of blasting projects in limestone mines

    A significant attention has been focused on the environmental effects of blasting activities. Since some of the limestone mines are located close to the administrative buildings and production facilities, an environmental evaluation of the blasting impact in neighbouring areas is necessary. The most important concerns about the human health and safety are flyrocks, vibrations (whether air or ...


    By Inderscience Publishers

  • The physics of epistemology

    A comprehensive and generalised model of human cognitive processes has been put together by the author based on his research and investigations carried out periodically over an extended period of time. The model is represented by three Venn diagrams. These consist of three fuzzy sets, one representing quantum mechanical processes, one representing pattern recognition processes and one ...


    By Inderscience Publishers

  • Raman imaging at biological interfaces: applications in breast cancer diagnosis

    Abstract Background: One of the most important areas of Raman medical diagnostics is identification and characterization of cancerous and noncancerous tissues. The methods based on Raman scattering has shown significant potential for probing human breast tissue to provide valuable information for early diagnosis of breast cancer. A vibrational fingerprint from the ...


    By AcuTech Scientific Inc.

  • Model identification for nonlinear automotive seat cushion structure

    This paper presents the nonlinear characteristics of typical automotive seat cushion structures. The experimental transfer functions between the seat butt (upper surface of seat cushion) and the seat track show that the magnitude and frequency decrease as the excitation increases. This indicates that the structure has both nonlinear stiffness and nonlinear damping. This paper develops two ...


    By Inderscience Publishers

  • NoiseNews: Something Fishy Going on in British Waters?

    The seas around Britain may be getting too noisy. So noisy in fact that fish species such as cod and haddock are having difficulty communicating with each other. If their chatter is being obscured, it could affect their ability to breed at a time when stock numbers are recovering. It has long been recognised that large marine mammals are susceptible to noise pollution – as ...


    By Cirrus Research plc

  • Environmental Noise

    Introduction The ability to hear sounds is a sensory function vital for human survival and communication. However, not all sounds are wanted. 'Unwanted sounds', for which the term 'noise' is normally used, often have their origin in human activities (mainly transport, industry and households). This article addresses environmental noise ­ also referred to in the scientific literature as ...

  • Environmental Noise (Booklet)

    About this booklet This booklet deals with environmental noise − for example, noise from industrial sites, road and rail traffic, airports and fairgrounds. It does not cover related issues such as building acoustics, building vibration or domestic noise. Neither does it cover human response to vibration nor industrial uses of sound and vibration measurements. Please contact ...

  • Two Modified IEC 60318-4 Ear Simulators for Extended Dynamic Range

    The international standard IEC 60318-4 specifies an occluded ear simulator, often referred to as a 711-coupler, for testing headphones, earphones, hearing protectors, hearing aids etc. The standard specifies a specific microphone type which limits the dynamic range of the coupler both in the low range and in the high. To overcome these limitations, G.R.A.S. has developed two modified versions of ...

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