| Analysis of loudness and sound pressure level of sound signals of grain harvesting combine |
| Paper ID : 1413-NICAME1402 |
| Authors: |
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Mahsa Forouzandeh shahraki *1, ali maleki2, shahin besharati3, Majid lashgari4 1Department of Biosystem mechanical engineering, Faculty of Agricultur, University of Shahrekord 2Department of Biosystems Mechanical Engineering,faculty of agriculture،University of Shahrekord 3Department of Mechanical Engineering,faculty of agricultur، University of Shahrekord 4Department of Biosystems Mechanical Engineering,faculty of agricultur، University of Arak |
| Abstract: |
| The problems that noise causes on people's health and efficiency when they are exposed to more than the permissible levels for long periods of time have been a very important issue for researchers in recent decades. Because it contributes a lot to the level of efficiency, activity, fatigue, stress, etc. of a human being. To investigate and analyze the sound quality standards, the recorded signals of two combiners, Sampo 3065 and Jandir 1055, were used. The sound quality criteria were analyzed by MATLAB 2020 software. The factors studied in this research were gear ratio, engine speed in three repetitions for both combines. Loudness and sound level were calculated for both combines. From the results of this research, it can be found that in the Simpo combine, the sound level in slow speed is 6.68 and in fast speed it is 13.43. In the Jandir combine, the sound level was 8.20 in slow speed and 19.12 in fast speed. Also, in Sampo combine, the sound level in slow speed is equal to 17.52 dB and in fast speed is equal to 85.57 dB. Also in Jandir combine, the average sound level in slow speed is equal to 54.02 dB and its value in fast speed is equal to with 10.66 dB. |
| Keywords: |
| Noise, engine speed, sound quality, gear ratio, combine |
| Status : Paper Accepted (Poster Presentation) |
