| Personal noise exposures of operators of agricultural tractors. | |
| | |
MedLine Citation:
|
PMID: 19674734 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Approximately one million agricultural tractors are used in Turkey for crop production and about one-third of the population lives in rural areas. The objectives of this study were to determine sound pressure levels, A-weighted sound pressure levels, and the permissible exposure time for tractors without cabins, field-installed cabins, and original cabins at ear level of agricultural tractor operators for following machines: plows, cultivators, top soil cultivators, rotary tillers, tool combinations (harrow+roller), mechanical drills, pneumatic drills, chemical applicators, fertilizer applicators, drum mowers, balers, and forage harvesters. Variance analyses showed that type of operation, type of cabins, and operation x cabin interactions were statistically significant (P<0.01) both for sound pressure levels and equivalent (A-weighted) sound pressure levels. The use of original cabins had a greater effect in decreasing average sound pressures and resulted in more efficient noise insulation, especially at higher center frequencies compared to field-installed cabins whereas field-installed cabins proved to be more favorable compared to tractors without cabins. Sound pressure levels at 4000Hz center frequency was reduced 2-13dB and 4-18dB by using a field-installed cabin and an original cabin, respectively. The measured A-weighted equivalent sound pressure levels were compared to the threshold limit level, and was concluded that depending on the cabin types used, the operators could usually work from 4 to 6h a day without suffering from noise induced inconveniences while 2-3h is permissible for plowing and forage harvesting on tractors without cabins. Due to timeliness considerations in agricultural machine operations, a farmer would not be willing to interrupt the operation based on permissible exposure time set by the standards. Based on the findings of this study, particularly an original cabin is recommended to reduce machine-induced noise below the danger limit during agricultural machine operations. Personal protection devices should be used when tractors are operated without cabins, which could reduce A-weighted equivalent sound pressure levels by 10-45dB(A). |
| | |
Authors:
|
Ali Aybek; H Atil Kamer; Sel?uk Arslan |
Related Documents
:
|
944034 - Hearing under stress: iii. the effect of external auditory meatal pressure on speech di... 8759944 - Acoustic radiation pressure in a three-dimensional lossy medium. 874544 - An audible alarm for monitoring air embolism during neurosurgery. 18083734 - Singing with reduced air sac volume causes uniform decrease in airflow and sound amplit... 11386794 - Haemodynamics of arteriovenous malformations of the brain and consequences of resection... 16553284 - Influence of aminoguanidine, an inhibitor of inducible nitric oxide synthase, on the pu... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-08-11 |
Journal Detail:
|
Title: Applied ergonomics Volume: 41 ISSN: 1872-9126 ISO Abbreviation: Appl Ergon Publication Date: 2010 Mar |
Date Detail:
|
Created Date: 2009-11-16 Completed Date: 2010-02-18 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0261412 Medline TA: Appl Ergon Country: England |
Other Details:
|
Languages: eng Pagination: 274-81 Citation Subset: IM |
Affiliation:
|
Department of Agricultural Machinery, College of Agriculture, Kahramanmara? S?t?? Imam University (KSU), Kahramanmaras, Turkey. aaybek@ksu.edu.tr |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Agriculture* Analysis of Variance Equipment Design* Female Humans Male Noise, Occupational / prevention & control* Occupational Exposure / analysis* Turkey |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Injury severity assessment for underground coalmine workers.
Next Document: Sorting and disposing of waste at recycling centres - A users perspective.