although technical development has positive consequences for public welfare, its influences on environment especially by noise is considerable. three-dimensional maps of noise pollution made it possible to control and prevent its spread. in this research, primarily because of the lack of a standard model of noise in iran, we chose the standard noise mapping method 1 (smm1) which has been spread...

The menace of noise is a by-product of civilization and its hazards are well known. Noise levels were measured in Karachi, at different places and at different times of the night and day, using an Amplaid noise meter. The leg for Karachi came to 80 dB (A), the General Noise Index x (G.N.I.) to 460, and the noise pollution level (N.P.L.) to 99 dB (A). These values are significantly higher (P les...

noise is one of the major hazardous occupational exposures and one of the occupations at risk is the transportation industry. however, few studies have measured and reported the amount of noise exposure in drivers. in this study, we evaluated noise exposure among the public transportation bus drivers of one major iranian city, kerman, southeast iran. eighty public transportation buses in the st...

background and aim: speech understanding almost never occurs in silence. verbal communication often occurs in environments where multiple speakers are talking. in such environments, babbling noise masks speech comprehension. consonants, in comparison to vowels, are more sensitive to noise masking. consonants provide most acoustic information needed for comprehending the meaning of the word. sin...

noise is one of the main parameters to be considered to achieve a healthy indoor ambience in ferries. therefore, the noise standards need to be more specialized and specifically based on real sampled data and case studies. in the present research, the noise levels in a ship, under different working conditions, were sampled and compared with those specified in the new and old standards. an initi...

background exposure to the excessive levels of occupational noise is one of the principal harmful agents affecting the workers’ health. this study aimed to investigate the relationship between the occupational noise exposure and the hearing loss caused by working in small-scale service industries in the city of damavand, close to the metropolitan capital city of tehran, iran. methods this descr...

simultaneous exposure of highly-used chemical and physical agents are expected to happen in many occupations. in the present study the impact of simultaneous exposure to noise and formaldehyde on oxidative stress in blood and liver tissue of rat was investigated. animal study was conducted in the school of public health, shahid beheshti university of medical scineces, tehran, iran in 2013. a to...