“…Noise in big cities is considered by the World Health Organization (WHO) to be the third most hazardous type of pollution, right after air and water pollution (Zannin, 2008;Mohammadi, 2009). Traffic has been recognized as the main noise source in cities, being this problematic more important in developing countries (Kumar et al, 1998;Zannin, 2008;Mohammadi, 2009;Zekry, 2009;Jose et al, 2012;Novačko et al, 2014). Nowadays, the United States Environmental Protection Agency considers noise as an environmental problem affecting the largest number of people on the planet, after air and water pollution (United State Environmental Protection Agency, 2001).…”