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Abstract

Low frequency noise is one of the most harmful factors occurring in human working and living environment. Low frequency noise components from 20 to 250 Hz are often the cause of employee complaints. Noise from power stations is an actual problem for large cities, including Cairo. The noise from equipments of station could be a serious problem for station and for environmental area. The development of power stations in Cairo leads to appearing a wide range of gas turbines which are strong source of noise. Two measurement techniques using C-weighted along side the A-weighted scale are explored. C-weighting is far more sensitive to detect low frequency sound. Spectrum analysis in the low frequency range is done in order to identify a significant tonal component. Field studies were supported by a questionnaire to determine whether sociological or other factors might influence the results by using annoyance rating mean value. Subjects included in the study were 153 (mean = 36.86, SD = 8.49) male employees at the three electrical power stations. The (C-A) level difference is an appropriate metric for indicating a potential low frequency noise problem. A-weighting characteristics seem to be able to predict quite accurately annoyance experienced from LFN at workplaces. The aim of the present study is to find simple and reliable method for assessing low frequency noise in occupational environment to prevent its effects on work performance for the workers. The proposed method has to be compared with European methods.
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Authors and Affiliations

Adel M. Shehap
Hany A. Shawky
Tarek M. El-Basheer
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Abstract

The article presents method of assessment of one of the three basic aspects of sustainable construction concerning social utility properties of residential buildings. The study was based on the recommendations of standards [1] and [2], on the basis of which the area of features characterizing the social aspect of buildings was determined. Additionally, the presented method includes criteria which are necessary for the assessment of this aspect, and which are not included in the normative guidelines. The presented method fits in with the current trend of sustainable construction. This method enables and facilitates the comparison of social utility properties in different residential buildings. It is also allows for the classification of buildings according to the degree to which they meet their social utility properties; that can be a practical tool to support the decision on the future of the building (i.e., the sequence of necessary refurbishments) or the decision to buy or sell the property by indicating its strengths and weaknesses. By developing a way to assess a comprehensive set of criteria, the proposed method allows you to quickly and easily assess the social quality of residential buildings. In addition, the proposed measures for individual criteria can easily be adapted to requirements in other countries. The proposed “star” classification can also be used as a universal scale for assessing the social quality index of buildings.
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Bibliography


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Authors and Affiliations

Aleksandra Radziejowska
1
ORCID: ORCID

  1. AGH University of Science and Technology in Cracow, Department of Geomechanics, Civil Engineering and Geotechnics, Av. Mickiewicza 30, 30-059 Cracow, Poland

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