SPECTRUM ANALYSIS FOR NOISE SOURCES FROM DIFFERENT SOUND LEVEL ZONES CREATING LOW FREQUENCY NOISE DISTRIBUTIONA.K. DASARATHY AND M. TAMIL SELVIAbstract Common people Individual ear will not be conscious of low frequency sound. The ear decreases sound at a low noise level compared to 25 dB at 100 Hz, 40 dB at 50 Hz and 70 dB at 20 Hz. The result at higher concentrations is not prominent with a decrease of about 5 dB. When the rate rises for 70 decibles, the frequency in the 20Hz range will not be so hearable. The noise level meters of the A scale will generate more noise signals that will be reflected on LFN. Present paper shows LFN for traffic-related sound sources and silent areas that produce noise. An estimate was developed using MATLAB to predict a sequence of spectrum analyzes. The end findings represent countless sound concentrations with a 10 Hz frequency interval difference. In the frequency range of 40 Hz to 80 Hz, sound concentrations show serious noise spectrum and show supreme to smallest. Spectrum analysis has been developed in all noise generation areas. The beat noise-like output of the detected signals shows that LFN has occurred and a careful reduction measures have to be taken to offset noise concentrations as quickly as possible. |