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    Wyświetlanie 1-8 z 8
    Tytuł:
    Design of Optimal Noise Hazard Control Strategy With Budget Constraint
    Autorzy:
    Monazzam, M. R.
    Fard, S. M. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/90404.pdf
    Data publikacji:
    2011
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    noise control strategy
    noise hazard
    optimization
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2011, 17, 4; 463-464
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noise Variability in Underground Room and Pillar Coal Mines
    Autorzy:
    Szary, M. L.
    Chugh, Y. P.
    Hirschi, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/90626.pdf
    Data publikacji:
    2011
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    underground noise control
    noise measurements
    noise-induced hearing loss
    Opis:
    Noise in an underground coal mine has dominant components generated mainly from 3 sources: (a) continuous mining machines, (b) roof bolters, and (c) cars/vehicles used to transport personnel and/or coal. Each of these 3 noise sources also has a number of well-defined sub-sources with their own noise characteristics. Sound level meters were used to collect noise data in the form of instantaneous readings and also to check calibration of other sound measuring instruments. The most useful information was obtained from a spectrum analysis of continuous digital recordings of noise over time. This paper discusses the variability or dynamics of generated noise in both frequency and time domains in relation to several independent variables related to coal extraction and transportation processes.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2011, 17, 3; 301-308
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Decision Support System for Designing Effective Noise Hazard Prevention Strategies
    Autorzy:
    Asawarungsaengkul, K.
    Nanthavanij, S.
    Chalidabhongse, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/90636.pdf
    Data publikacji:
    2007
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    decision support system
    noise hazard prevention
    genetic algorithms
    noise control
    capital budgeting
    Opis:
    A decision support system for designing effective noise hazard prevention (NHP) strategies is proposed. NHP consists of four modules: (a) database, (b) input, (c) algorithms, and (d) solution. The user can choose among single-, two-, and three-approach solution procedures. Heuristic and genetic algorithms are used to determine appropriate noise controls (NCs). From the given noise condition and NC budget, NHP recommends a minimum-cost NHP strategy that prevents any worker’s daily noise exposure from exceeding the permissible level. If the budget is insufficient, NHP is able to search for a feasible noise hazard strategy that requires a minimum NC budget.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2007, 13, 4; 451-470
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizing Noise Control Strategy in a Forging Workshop
    Autorzy:
    Razavi, H.
    Ramazanifar, E.
    Bagherzadeh, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/90448.pdf
    Data publikacji:
    2014
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    noise control
    noise exposure
    industrial noise pollution
    genetic algorithm
    kontrola hałasu
    hałas przemysłowy
    algorytm genetyczny
    Opis:
    In this paper, a computer program based on a genetic algorithm is developed to find an economic solution for noise control in a forging workshop. Initially, input data, including characteristics of sound sources, human exposure, abatement techniques, and production plans are inserted into the model. Using sound pressure levels at working locations, the operators who are at higher risk are identified and picked out for the next step. The program is devised in MATLAB such that the parameters can be easily defined and changed for comparison. The final results are structured into 4 sections that specify an appropriate abatement method for each operator and machine, minimum allowance time for high-risk operators, required damping material for enclosures, and minimum total cost of these treatments. The validity of input data in addition to proper settings in the optimization model ensures the final solution is practical and economically reasonable.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2014, 20, 2; 257-264
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noise Pollution in Metalwork and Woodwork Industries in the Kingdom of Saudi Arabia
    Autorzy:
    Noweir, M. H.
    Bafail, A. O.
    Jomoah, I. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/91079.pdf
    Data publikacji:
    2014
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    industrial noise
    metalwork
    woodwork
    noise control
    Saudi Arabia
    hałas przemysłowy
    metaloplastyka
    kontrola hałasu
    Arabia Saudyjska
    Opis:
    This study was conducted in metalwork and woodwork industries in Jeddah Industrial Estate. The purpose of this study was to assess the magnitude of industrial noise exposure and to propose remedial actions. Noise was measured at different times of a day in 28 randomly selected factories and workshops. Results indicated that noise levels varied according to the type and size of a factory, and the type and number of machines used. Mean noise levels in metalwork factories were higher than those in woodwork factories. The highest noise levels were observed while manufacturing cans and forming steel reinforcement for concrete, where noise levels exceed 90 dB(A). All mean noise levels in all studied metalwork factories and in 50% of studied woodwork industries were higher than the standard level of 85 dB(A).
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2014, 20, 4; 661-670
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of Optimal Noise Hazard Control Strategy With Budget Constraint
    Autorzy:
    Asawarungsaengkul, K.
    Nanthavanij, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/90824.pdf
    Data publikacji:
    2006
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    noise control strategy
    industrial noise hazard
    job rotation
    optimization
    hałas
    zagrożenia zdrowia
    ochrona przed hałasem
    kontrola bezpieczeństwa pracy
    hałas przemysłowy
    zagrożenia zawodowe
    Opis:
    An analytical design procedure to determine optimal noise hazard control strategies for industrial facilities is presented. Its objective is to determine a set of appropriate noise controls to eliminate or reduce noise levels so that workers’ daily noise exposure does not exceed a permissible level. From a given noise control budget, engineering controls will be firstly implemented, followed by administrative controls, and then the use of hearing protection devices. Six optimization models are developed and sequentially applied to select appropriate noise controls without exceeding the budget. Numerical examples are presented to demonstrate the application of the proposed design procedure.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2006, 12, 4; 355-367
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methodology of Selecting the Reference Source for an Active Noise Control System in a Car
    Autorzy:
    Dąbrowski, Z.
    Stankiewicz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/90182.pdf
    Data publikacji:
    2013
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    active noise control
    car
    vibroacoustics
    drivers
    ochrona przed hałasem i wibracją
    kierowcy i maszyniści
    aktywna redukcja hałasu
    wibroakustyka
    kierowca
    Opis:
    At the end of the 20th century, a significant development in digital technologies of signal processing made it possible to apply active noise control methods in new domains. A proper selection of the reference signal source is a main problem in implementing such systems. This paper presents an estimation method based on an indicator of the coherent power level. It also presents a simple system of active noise control in a car, operating according to the proposed method of optimising the positioning of reference sources. This system makes it possible to considerably increase the comfort of work of drivers in various kinds of road transport without a great increase in cost. This is especially significant in the case of trucks and vans. Passive barriers are considerably more expensive in them, which results in a higher level of noise than in passenger cars.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2013, 19, 1; 117-125
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application and Neural Networks in Active Noise Reduction Systems
    Autorzy:
    Morzyński, L.
    Makarewicz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/90886.pdf
    Data publikacji:
    2003
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    noise
    active methods
    control
    neural network
    hałas
    ochrona przed hałasem
    aktywna redukcja hałasu
    sieci neuronowe
    Opis:
    Active noise reduction systems based on a control unit in the form of a finite impulse response filter assume the linearity of every single component. Neural networks, which have so far been seldom used in this field, are a kind of a filter with the ability to project nonlinear characteristics of an active noise reduction system. This paper presents some simulation research studies of active noise reduction systems based on neural networks. Also presented are results of the operation of systems with different levels of complexity as well as the influence of different parameters of a neural network and of the system itself on those results.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2003, 9, 3; 257-270
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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