The mapping of environmental noise is typically done through computer modelling. During this, the annual average of the operation of noise sources and conditions of noise propagation into the environment is evaluated. The measurement of noise maps is not done due to the need for an extremely large number of noise level meters. Large number of noise level meters is necessary because they each have only one microphone, which detects noise equally from all directions. The hypothesis is that with a differential microphone antenna we could detect the direction from which the noise is coming from at a particular moment and that with the use of at least two differential microphone antennas we can determine the position of the source of noise, with which we can thus determine the sound power and subsequently measure the noise map. In the masters’ thesis, we will be the first to measure a noise map at a selected location with the help of three differential microphone antennas. Here, we will determine whether it is more appropriate to use three four-channel differential antennas that allow the detection of the direction of the noise source or two two-channel differential antennas that enable the determination of the line on which the noise source lies. We will also make the appropriate software that will enable the visualisation of the measured noise maps.
|