Introduction: Agriculture is one of the oldest jobs in the world and almost 7-2 billion
people all over the world are working in this field. In the field of
agriculture workers may be always in danger, due exposure to various chemical
and physical factors. Despite the dramatic technological developments in
agricultural science, this field is still among one of the most dangerous
workplaces in the world.
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Material and Method: This study is conducted in the suger cone industry. It is about
agricultural machines and their major role in noise production. In order to
identify the dominant- source index model was proposed.
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Result: All the agricultural machines were classified and the main characteristics
of each group such as type of the machines, their number, the number of
operators, and existence of cabin, were determined. Also operator's annual
exposure to noise was measured according to the international standards. The
data was analyzed with the proposed model formula, and the noise – source
indices were calculated.
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Conclusion: The results show that the suger cane reaper poster case I H7000 has the
highest noise- production index among all other agricultural equipments. So the
suger cane reaper was identified as the main source of sound production in the
agricultural industry. This machine in usually being used in harvesting the
suger can farms. After identifying this device as the main source of sound in
the suger can farming industry, a sound – controlling method was proposed in
order to reduce the operator exposure in the caloin. First a fall, the noise
frequently of the inside and outside of the cabin was analyzed in case the
engine speed was 2100 rpm. After identifying the dominant frequency, the
capacity of cabin sound reduction was determined with the usage of cabin
transferring reduction index the proposed control method was based on
increasing the absorption of the cabin. The results shows that the Sound pressure level indices
in the dominant frequencies of 125, 250, 500, 1000, 1000.2, 90.3 were
respectively 100.2,90.3, 86.6,83.6 but after performing the control method the
numbers were reduced to 82.1,75.2,80.5,80.2 in the other hand. Sound pressure
level in frequencies of 8000, 4000, 2000 was below the permutable limit and
does not cause significant dangers. So there will be no need for further
reduction in noise levels.