Solution of the Environmental Noise Problem Generated …
149
100 Hz
500 Hz
1000 Hz
Fig. 3 Simulation results in the sound propagation for different frequencies, without barrier (left)
and with barrier (right)
4 Design of the Acoustic Barrier
Simulation has pointed out that using a segmented barrier can be a solution to the
given problem. As this barrier is composed of the angled metal perforated panels,
the maximum efficiency of the panel, based on the measured noise spectra has been
exploited. The process of calculating the absorption coefficient accounts for the front
perforated panel thickness, hole repeat distance, hole radius, cavity depth, absorber
thickness, air space thickness, and flow resistivity, which is already well established
149
100 Hz
500 Hz
1000 Hz
Fig. 3 Simulation results in the sound propagation for different frequencies, without barrier (left)
and with barrier (right)
4 Design of the Acoustic Barrier
Simulation has pointed out that using a segmented barrier can be a solution to the
given problem. As this barrier is composed of the angled metal perforated panels,
the maximum efficiency of the panel, based on the measured noise spectra has been
exploited. The process of calculating the absorption coefficient accounts for the front
perforated panel thickness, hole repeat distance, hole radius, cavity depth, absorber
thickness, air space thickness, and flow resistivity, which is already well established