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|Type:||Artigo de evento|
|Title:||Noise Generated By Portable Masonry Saws Operating Materials In Constructions|
|Abstract:||The National Association of Tile Manufacturers shows an increasing trend in production and consumption of ceramic tiles in Brazil these last years. The substitution of other ceramic coatings, because of their functional and esthetic features, they boosted the growth of the industry. The Masonry Saw is a portable electric machine manual largely used in civil construction in small cuts and finishes on surfaces, tiles, roofing, bricks and wood. It stands out with your versatility, practicality, levity and ergonomics. The purpose of this report is to present a comparative study of noise generated by masonry saw operations in constructions cutting of ceramic plates outside and enclosure, their conduct and the variables of interference in these activities. The methodology used to study it was considered the noise levels generated in the surroundings of the noise source at predefined points, searching for a relationship between the noise generated at points where external and internal areas. It was identifies 90.5 dB at 1.2 m of distance from the source enclosure. For the open field, they measured the levels of 86dB the same distance. The measurements in a radius of 2m from saw indicates values of 86dB. The comparative of the spectra indicate an increasing sound level among the frequencies of 100 and 4000Hz ranging from 40 to 100dB. Between 5000 and 8000 Hz the values remain relatively constant. The directionality of the source and the influence of distance from the source are observed in assessed noise. The results indicated that noise levels enclosure and open field are high. It was possible to quantitatively evaluate the level of noise generated in the cutting operations with a masonry saws in ceramics plates in construction and their behavior at points distributed outside the source.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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