the big cities of Sweden, the researchers have
demonstrated that noise effects will limit the
episodic memory (Enmarker, 2004). The traffic
policemen in metropolises are the most affected
groups exposed to this dangerous factor during
their working hours and in their leisure time. Ingle
et al. (2006) have been measured the noise dose
received by this group as 88 dB and, in some cases,
it has been increased up to even 100 dB (Ingle et
al., 2006). Statistic results published by
Organization for Economic Co-Operation and
Development (OECD) in 1994 specified that more
than 17 million people in France are exposed to
sounds louder than 55 dB during 8-20 hours of
their lives, whereas the minimum standard noise
for noise pollution in the environment is 55 dB