Hearing Profile of Brazilian Forestry Workers' Noise Exposure

Lacerda, Adriana Bender Moreira de; Quintiliano, Juliana; Lobato, Diolén Conceição Barros; Marques, Jair Mendes

doi:10.1055/s-0034-1382098

Cited by 5 publications

(2 citation statements)

References 14 publications

(20 reference statements)

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“…These reviews included the above electronic database online literature searches related to NIHL in animal models and human [Tables 1 and 2 ]. [ 16 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 ] The information regarding numbers of publication on NIHL from Asian countries was obtained from ISI Web of Science [ Figure 5 ]. According to the database, only five publications on NIHL were reported from India.…”

Section: S Ource Of D Atamentioning

confidence: 99%

Cochlear proteins associated with noise-induced hearing loss: An update

Jain¹,

Pingle²,

Tumane³

et al. 2018

Indian J Occup Environ Med

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Noise-induced hearing loss (NIHL) is one of the major occupational disease that has influence on the quality of life of mining workers. Several reports suggest NIHL is attributed to noise exposure at workplace and approximately 16% of hearing loss is due to it. NIHL occurs as a result of exposure to high-level noise (>85 dB) in the workplace. Noise disrupts proteins present in the micromachinery of the ear that is required for mechano-electric transduction of sound waves. High-level noise exposure can lead to hearing impairment owing to mechanical and metabolic exhaustion in cochlea, the major organ responsible for resilience of sound. Several key proteins of cochlea include tectorial membrane, inner hair cells, outer hair cells, and stereocilia are damaged due to high-level noise exposure. Numerous studies conducted in animals have shown cochlear proteins involvement in NIHL, but the pertinent literature remains limited in humans. Detection of proteins and pathways perturbed within the micromachinery of the ear after excessive sound induction leads toward the early identification of hearing loss. The situation insisted to present this review as an update on cochlear proteins associated with NIHL after an extensive literature search using several electronic databases which help to understand the pathophysiology of NIHL.

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Section: S Ource Of D Atamentioning

confidence: 99%

Cochlear proteins associated with noise-induced hearing loss: An update

Jain¹,

Pingle²,

Tumane³

et al. 2018

Indian J Occup Environ Med

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“…conducted on forestry workers reported NIHL among 23.8% of participants exposed to higher than 85 dB noise, with 5.5% of those exposed to 85–89.9 dB noise and 11% of those exposed to higher than 90 dB noise also experiencing NIHL. [ 7 ] Noise exposure can cause stress responses such as increased adrenaline and noradrenaline levels and can also induce changes in the cardiovascular system. [ 8 ] Biological studies have shown correlations between high-frequency hearing loss and occupational exposure.…”

Section: Introductionmentioning

confidence: 99%

An assessment of noise exposure and hearing health status among auto body workers in Kermanshah, Iran

Kakavandi

Omidi

Hashemian

et al. 2021

J Edu Health Promot

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BACKGROUND: Unwanted sound is recognized as the most extensive source of contaminant in the workplace. Exposure to intense, continuous, and higher than 85 dB level noise can lead to noise-induced hearing loss. The aim of the present study was to determine the level of noise exposure and its impact on hearing health among auto body workers. MATERIALS AND METHODS: This descriptive-analytic study was conducted in 2020 to investigate the hearing health status of workers in auto body workshops. Sixty-one participants were randomly selected for audiometric testing. The equivalent sound level (Leq) of the workers was measured using a Casella CEL-320 noise dosimeter. Audiometric testing was performed using an AC40 audiometer. The mean hearing threshold levels (HTLs) of both ears were calculated for different frequencies. The results obtained were analyzed using SPSS v21.0 at a significance level of 95%. RESULTS: The participants had an average age of 35.5 ± 11.8 years and an average work experience of 16.5 ± 9.8 years. The mean Leq was 92.3 ± 4.7 dB. The mean HTLs for the right ear and left ear were 20, 15, 17.6, 19.2 dB, respectively with the right ear suffering more loss. A significant relationship was found between hearing loss in both ears ( P < 0.001). The highest prevalence of hearing loss in both ears was observed at a frequency of 4 kHz. About 73.8% of the subjects had a normal HTL, 23.3% had mild hearing loss, and 3.3% had severe hearing loss. With increasing work experience, HTLs also increased significantly, particularly at 2–8 kHz. CONCLUSIONS: Chronic exposure to noise pollution threatens hearing health. Therefore, it is necessary to raise the level of awareness among workers in order to enable better hearing health protection and also to promote the use of hearing protection devices.

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Mechanized Wood Extraction: Impacts on Operators’ Hearing Health

Camargo¹,

Munis²,

Miyajima³

et al. 2022

Forests

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The activity of the mechanized extraction of wood, carried out by means of self-propelled forest machines, consists of moving the wood cut inside the forest stand from the planted forests to the roadside. During displacements, these machines normally travel over forest residues and stumps, which can demand greater motor power from the engine, in addition to the possible increase in occupational noise levels. In this context, we evaluated whether, when operating different self-propelled forest machines in the wood extraction of planted Eucalyptus forests, operators are exposed to different levels of occupational noise, especially to thresholds above those established for prevention purposes. Occupational noise data were collected during the workday, weighing six self-propelled forest machine operators who performed the wood-extraction operation, performed by two forwarders, two self-loading tractors, and two grapple skidders, in three areas with Eucalyptus plantations located in the southeastern region of Brazil. The sound-pressure level was collected using two integrative meters following the strategic measurement criterion recommendation for the whole day in the guidelines of the acoustic determination of occupational noise exposure and analyzed according to the American Conference of Government Industrial Hygienists. Operators of forest machines for the mechanized extraction of wood were exposed to occupational noise levels above the recommended level, which can affect health and well-being; this occupation also required above-average levels of attention during the execution of work activities.

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Hearing Profile of Brazilian Forestry Workers' Noise Exposure

Cited by 5 publications

References 14 publications

Cochlear proteins associated with noise-induced hearing loss: An update

Cochlear proteins associated with noise-induced hearing loss: An update

An assessment of noise exposure and hearing health status among auto body workers in Kermanshah, Iran

Mechanized Wood Extraction: Impacts on Operators’ Hearing Health

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