Impulse noise and hand-arm vibration in relation to sensory neural hearing loss.
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TLDR
It is suggested that exposure to impulse noise increases the risk of SNHL, but that simultaneous exposure to hand-arm vibration and noise does not.Abstract:
The present study was carried out to determine whether impulse noise and simultaneous exposure to noise and vibration can aggravate sensory neural hearing loss (SNHL) among forest (N = 199) and shipyard (N = 171) workers. The average level of exposure to noise outside the used earmuffs and the average exposure over time were nearly equal for the two groups. The impulsiveness of the noise and the average exposure level inside the earmuffs were measured with a miniature microphone. The hearing threshold of the workers was measured at 4 kHz and then estimated according to Robinson's model to compare the observed and expected hearing loss. The impulsiveness of the noise was greater both outside and inside the earmuffs in shipyard work than in forest work. The average SNHL was higher than predicted for the shipyard workers and about the same as predicted for the forest workers. The total exposure level inside the earmuffs was influenced by the total wearing time. The low frequencies of the chain-saw noise were not attenuated sufficiently by the earmuffs to protect the workers' hearing. The present study suggests that exposure to impulse noise increases the risk of SNHL, but that simultaneous exposure to hand-arm vibration and noise does not.read more
Citations
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Journal ArticleDOI
Association between variations in CAT and noise-induced hearing loss in two independent noise-exposed populations
Annelies Konings,Lut Van Laer,Małgorzata Pawełczyk,Per-Inge Carlsson,Marie-Louise Bondeson,Elzbieta Rajkowska,Adam Dudarewicz,Ann Vandevelde,Erik Fransen,Jeroen R. Huyghe,Erik Borg,Mariola Sliwinska-Kowalska,Guy Van Camp +12 more
TL;DR: It is indicated that catalase is a NIHL susceptibility gene, but that the effect of CAT polymorphisms can only be detected when noise exposure levels are taken into account.
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Age and noise-induced hearing loss.
TL;DR: The elderly subjects were more susceptible to NIHL than younger subjects, and factors independently but causally related to age were important in the development of NIHL among workers exposed to noise levels below 98 dB(A).
Journal ArticleDOI
Task-based assessment of occupational vibration and noise exposures in forestry workers.
TL;DR: The task and tool with the highest exposure levels were unbelling chokers on landings and chain saws, log processing and frontend loaders (WBV), and notching stumps and chain Saws (HAV).
Journal ArticleDOI
Estudo dos efeitos auditivos e extra-auditivos da exposição ocupacional a ruído e vibração
Márcia Fernandes,Thais C. Morata +1 more
TL;DR: A series of weaknesses in the health surveillance of these populations are revealed and indicated the need for the implementation of preventive programs focusing on their exposures to noise and vibration.
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Individual susceptibility to noise-induced hearing loss
TL;DR: Smoking and cholesterol are independently but causally related to NIHL and may cause the subject to be more susceptible for noise damage, and ageing further confounds some of these factors.
References
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Book
Engineering Applications of Correlation and Spectral Analysis
TL;DR: This chapter discusses single-Input/Single-Output Relationships, nonstationary data analysis techniques, and procedures to Solve Multiple- Input/Multiple-Output Problems.
Book
New Perspectives on Noise-Induced Hearing Loss
TL;DR: Hearing impairment is the third most prevalent chronic disability in the United States, and hearing loss in the speech frequency region is currently estimated to affect 29 million Americans ages 20–69 years based on 2003–2004 data.
Journal ArticleDOI
Methods of measuring the attenuation of hearing protection devices
TL;DR: The analysis indicates that the REAT method is one of the most accurate available techniques since it assesses all of the sound paths to the occluded ear and, depending upon the experimenter's intention, can reflect actual in-use attenuation as well.
Journal ArticleDOI
Hand-arm vibration in the aetiology of hearing loss in lumberjacks.
TL;DR: A longitudinal study of hearing loss was conducted among a group of lumberjacks in the years 1972 and 1974, finding that vibration might operate in both of these disorders through a common mechanism--that is, producing a vasoconstriction in both cochlear and digital blood vessels as a result of sympathetic nervous system activity.