The chart illustrates the changes in the number of appeals about noise pollution from 1980 to 1996.
Overall, the number of claims about the nature of distracting sounds had significantly changed. The complaints about the road works were steadily decreasing. Meanwhile, those about factory noise were gradually growing, maintaining the same level till the end of the observed period. However, the number of city citizens' discontent with traffic and household noise wildly fluctuated.
In 1980, the highest number of complaints was due to road works (nearly 650), which then nearly halved to 1986. The discontent regarding household and traffic was at a lower level, at about 500 and nearly 300, but declined six years later. By contrast, complaints concerning factory noise followed an upward trend, indicating a rise from the lowest 400 early in the period to well above 700 in 1986.
Subsequently, the road works continued a downward trend, hitting bottom at almost 100 claims by the end. On the other hand, the number of appeals to the city hall about household and traffic had grown significantly after two years of stability. The figures went up to 1200 and 600, respectively. On the contrary, noise pollution produced by factories caused no more complaints, keeping the number at approximately 700.
The chart illustrates the
changes
in the
number
of appeals about
noise
pollution from 1980 to 1996.
Overall
, the
number
of claims about the nature of distracting sounds had
significantly
changed
. The
complaints
about the road works were
steadily
decreasing. Meanwhile, those about factory
noise
were
gradually
growing, maintaining the same level till the
end
of the observed period.
However
, the
number
of city citizens' discontent with traffic and household
noise
wildly
fluctuated.
In 1980, the highest
number
of
complaints
was due to road works (
nearly
650), which then
nearly
halved to 1986. The discontent regarding household and traffic was at a lower level, at about 500 and
nearly
300,
but
declined six years later. By contrast,
complaints
concerning factory
noise
followed an upward trend, indicating a rise from the lowest 400 early in the period to well above 700 in 1986.
Subsequently
, the road works continued a downward trend, hitting bottom at almost 100 claims by the
end
.
On the other hand
, the
number
of appeals to the city hall about household and traffic had grown
significantly
after two years of stability. The figures went up to 1200 and 600,
respectively
.
On the contrary
,
noise
pollution produced by factories caused no more
complaints
, keeping the
number
at approximately 700.