Research on effecting mechanism of environmental parameters on human ear

Hu, Songtao; Mu, Yuanpeng; Liu, Guodan; Zhang, Lu

doi:10.1016/j.buildenv.2017.03.039

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…It is well known that the consequences of exposure to noise and vibrations can be very serious [10], but the symptoms of the disease can appear several years after the exposure. Occupational noise [11] is defined as sound pressure perceived by the human ear as an undesirable sound with different frequencies, intensities, and phases [12]. According to EU Directive 2003/10/EC [13], the noise maximum exposure threshold is equal to 87 dB(A) considered as the time-weighted average value of noise exposure levels for a nominal eight-hour working day.…”

Section: Introductionmentioning

confidence: 99%

What Is the Current Ergonomic Condition of Chainsaws in Non-Professional Use? A Case Study to Determine Vibrations and Noises in Small-Scale Agroforestry Farms

Papandrea

Cataldo

Zimbalatti

et al. 2022

Forests

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Agroforestry or agricultural forestry is an important resource for the exploitation of wood resources commonly based on a low level of mechanization and integrating agriculture crops land-management. Agroforestry areas consist often of buffer strip forest along the farms’ boundaries or on small forest stands within the same farms. Felling is commonly based on the use of chainsaws which are used occasionally, and are often aged models and with little maintenance done on them. In this context, the present study analyzes the vibration and noise generated by chainsaws in the specific contest of the agroforestry farms. The aim is to verify the hand-arm vibrations and noise level, which self-employed agroforest operators are exposed with the occasional use of aged and rarely maintained chainsaws. The main results show that vibration exposures are significantly affected by the model and condition of use of the chainsaw and at lower level, but still significant, by the wood and the position of the handle. Regarding noise levels, the chainsaw model and condition of use also has significant effects. In summary, this study highlights that the importance of the condition of use of the chainsaw has an important effect on the vibrations and noise exposition and that these, although limited due to the limited daily use by operators, must be carefully taken into consideration, and provide for containment actions through adequate information and training.

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Section: Introductionmentioning

confidence: 99%

What Is the Current Ergonomic Condition of Chainsaws in Non-Professional Use? A Case Study to Determine Vibrations and Noises in Small-Scale Agroforestry Farms

Papandrea

Cataldo

Zimbalatti

et al. 2022

Forests

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“…Petrol chain saws commonly used in forestry produce noise which can be characterized as acoustic pressure perceived by the human ear as an undesirable noise of diverse frequencies, intensities and phases (Hu et al 2017; Shende et al 2018). High-capacity chain saws can generate engine noise levels up to 113 dB (Fonseca et al 2015), which represents considerable risks for their operators.…”

Section: Introductionmentioning

confidence: 99%

Changes in the exposure to power saw noise during individual partial activities of tree felling in dependence on the stem wood moisture content

Staněk

Mergl

Neruda

2022

Preprint

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This study deals with the level of noise to which power saw operators are exposed during partial activities of tree felling and persons moving in its surroundings. It also aims to reveal the existence of dependence between the level of produced noise and the moisture content of the felled tree by comparing the noise levels of individual partial activities. The process of tree felling was broken down into partial activities (pruning of the lower tree part; cutting off buttresses; felling; delimbing) during which exposure to noise caused by the power saw was measured. The noise was measured by the noise level meter at the operator’s ear at distances of 5 m and 10 m from the source of noise (power saw) in compliance with EN ISO 22868 and EN ISO 9612 standards. The noise was measured in a total of 121 trees processed by one power saw operator using one and the same type of power saw and one and the same type of saw chain. Research results revealed a noise level difference of individual operations in 88.10% of compared cases. Mean noise levels close to the operator’s ear ranged from 95,193.499 dB to 101,098.174 dB and mean noise values at a distance of 10 m ranged from 70,573.677 dB to 78,370.818 dB. A maximum noise level (115,720.000 dB) was measured during the partial operation of Delimbing near the operator’s ear; a minimum noise level (51,650000 dB) was recorded during this operation, too.

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“…Therefore, it is considered an unhealthy environment that exposes operators to physical and psychological disorders [13][14][15][16]. Among the physical agents, occupational noise [17,18] stands out, characterized as sound pressure perceived by the human ear as an undesirable sound with different frequencies, intensities and phases [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Exposure to Occupational Noise among Forestry Machine Operators: A Case Study in Brazil

Camargo

Munis

Simões

2021

Forests

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In mechanized harvesting of wood operations, in a cut-to-length system, occupational noise is emitted by self-propelled forest machines, which compromises the safety and health of operators. Therefore, the occupational noise levels emitted by self-propelled forestry machines, in a cut-to-length system, were investigated to determine which are in line with current Brazilian legislation. The noise levels issued by 22 self-propelled forestry machines in the mechanized harvesting of wood operations, in Eucalyptus and Pinus planted forests, were collected during a full day of measurement. Taking into account the operations performed and the type of planted forest, homogeneous groups of operators were formed. Based on Regulatory Norms N.9 and N.15 adopted for labor purposes in Brazil, occupational noise levels were analyzed. In relation to harvester operators, 36.4% were exposed to values above the exposure limit of 85 dB (A) and 63.6% to the action level of 80 dB (A). Regarding the forwarder operators, 100% were exposed to values that exceeded the action level. For the analyzed conditions, for the cut-to-length system employed in harvesting wood in forest planted with Eucalyptus and Pinus, the occupational noise levels of the self-propelled forest machines are not in line with current Brazilian legislation for labor purposes.

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Research on effecting mechanism of environmental parameters on human ear

Cited by 5 publications

References 15 publications

What Is the Current Ergonomic Condition of Chainsaws in Non-Professional Use? A Case Study to Determine Vibrations and Noises in Small-Scale Agroforestry Farms

What Is the Current Ergonomic Condition of Chainsaws in Non-Professional Use? A Case Study to Determine Vibrations and Noises in Small-Scale Agroforestry Farms

Changes in the exposure to power saw noise during individual partial activities of tree felling in dependence on the stem wood moisture content

Investigation of Exposure to Occupational Noise among Forestry Machine Operators: A Case Study in Brazil

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