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D. Mihajlov et al.
2.2 Noise Level in the Technical Room
To solve the noise problem, all of six pumps in the operation regime have been
considered. After the series of five measurements with a 5 min interval, mean value
of the noise level inside technical room has been obtained L AFeq,t=5min = 98.4 dB.
Instrument that has been used for measurements is Brüel&Kjær, type 2270, at the
height of 1.5 m from the floor of the room.
2.3 Noise Level at the Receiver
To determine the amount of noise pollution of the environment, generated by
water pump station, series of measurements have been taken at the border of the
industrial complex and the adjacent territory defined as the strictly residential area
without the traffic noise influence. After taking the five measurements in the 5 min
interval, average equivalent background noise level has been obtained L AFeq,res,t=5min
= 44.2 dB. After turning all of the six water pump engines, process has been repeated
under the same conditions, and average equivalent noise level obtained L AFeq,t=5min
= 68.7 dB. Measurements has been done without influence of the traffic, due to the
fact that traffic frequency is very low during the day and evening, especially during
the night.
Results that have been gathered point to the following conclusion
• water pump engines in the absence of traffic represents the dominant noise sources
at the given location;
• to reduce the noise level at the given location, it is necessary to undertake certain
technical measures to reduce the amount of emitted noise.
3 Study Case—Problem Analysis
3.1 Choice of the Problem Solving Strategy and Task
Definition
Solution for the excess noise problem at the receiver position can be done in tri ways
[5]:
1. Undertake the technical measures at the noise source by applying enclosure
around the sources, where it is necessary to provide nominal operational functionality of the machines and enable easy maintenance access. If entire facility
where machines are installed is considered as a noise source, then it is possible
to apply the acoustic treatment inside the room (walls, ceiling, etc.) by lining
D. Mihajlov et al.
2.2 Noise Level in the Technical Room
To solve the noise problem, all of six pumps in the operation regime have been
considered. After the series of five measurements with a 5 min interval, mean value
of the noise level inside technical room has been obtained L AFeq,t=5min = 98.4 dB.
Instrument that has been used for measurements is Brüel&Kjær, type 2270, at the
height of 1.5 m from the floor of the room.
2.3 Noise Level at the Receiver
To determine the amount of noise pollution of the environment, generated by
water pump station, series of measurements have been taken at the border of the
industrial complex and the adjacent territory defined as the strictly residential area
without the traffic noise influence. After taking the five measurements in the 5 min
interval, average equivalent background noise level has been obtained L AFeq,res,t=5min
= 44.2 dB. After turning all of the six water pump engines, process has been repeated
under the same conditions, and average equivalent noise level obtained L AFeq,t=5min
= 68.7 dB. Measurements has been done without influence of the traffic, due to the
fact that traffic frequency is very low during the day and evening, especially during
the night.
Results that have been gathered point to the following conclusion
• water pump engines in the absence of traffic represents the dominant noise sources
at the given location;
• to reduce the noise level at the given location, it is necessary to undertake certain
technical measures to reduce the amount of emitted noise.
3 Study Case—Problem Analysis
3.1 Choice of the Problem Solving Strategy and Task
Definition
Solution for the excess noise problem at the receiver position can be done in tri ways
[5]:
1. Undertake the technical measures at the noise source by applying enclosure
around the sources, where it is necessary to provide nominal operational functionality of the machines and enable easy maintenance access. If entire facility
where machines are installed is considered as a noise source, then it is possible
to apply the acoustic treatment inside the room (walls, ceiling, etc.) by lining