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Ethylbenzene-Induced Hearing Loss, Neurobehavioral Function, and Neurotransmitter Alterations in Petrochemical Workers
Objective : To estimate hearing loss, neurobehavioral function, and neurotransmitter alteration induced by ethylbenzene in petrochemical workers. Methods : From two petrochemical plants, 246 and 307 workers exposed to both ethylbenzene and noise were recruited—290 workers exposed to noise only from a power station plant and 327 office personnel as control group, respectively. Hearing and neurobehavioral functions were evaluated. Serum neurotransmitters were also determined. Results : The prevalence of hearing loss was much higher in petrochemical groups than that in power station and control...
Mining, Manufacturing, and Construction industries need better engineering controls for noise
The purpose of this study is to estimate the prevalence of hearing loss among U.S. industries. 2000–2008 audiograms for male and female workers ages 18–65, who had higher occupational noise exposures than the general population, were examined. Prevalence and adjusted prevalence ratios (PRs) for hearing loss were estimated and compared across industries. In our sample, 18% of workers had hearing loss. Workers in the Mining, Manufacturing, and Construction industries need better engineering controls for noise and stronger hearing conservation strategies. More hearing loss research is...
Wireless Communication : Good team communication under difficult and potentially dangerous conditions required
Team communication is absolutely essential in creating a safe, productive and effective work environment. Ambient noise can dramatically affect the clarity of team communications. First responders may be subjected to deafening siren noise while en route to a rescue operation, but they are not alone. Many industries expose workers to high noise levels on the job. Airport ground personnel must contend with the roar of jet engines. Road and construction crews must communicate against a backdrop of heavy equipment. Factory workers must talk over the noise of a manufacturing plant. These seemingly unrelated...
A bit isolator and a chuck isolator reduce the noise radiated by the drill steel and chuck
Among underground coal miners, hearing loss remains one of the most common occupational illnesses. In response to this problem, the National Institute for Occupational Safety and Health (NIOSH) Office of Mine Safety and Health Research (OMSHR) conducts research to reduce the noise emission of underground coal-mining equipment, an example of which is a roof bolting machine. Field studies show that, on average, drilling noise is the most significant contributor to a roof bolting machine operator’s noise exposure. NIOSH OMSHR has determined that the drill steel and chuck are the dominant sources...
Damper with optimised progressive damping characteristic is better at shock mitigation than suspended commercial seat as presently available
A single degree-of-freedom simulation model of a seat equipped with a non-linear fore-and-aft suspension system was developed. The performance of a typical fore-and-aft suspension system was analysed using typical vibration and shock acceleration signals measured in loaders while travelling on off-road terrain and while driving the bucket into a heap of soil. The simulations are of use to seat manufacturers in developing improved fore-and-aft seat suspension for wheel loaders. Source: Study of simultaneous shock and vibration control by a fore-and-aft suspension system of a driver’s seat...
Driving an unloaded bucket resulted in significantly higher levels of vibration exposure than with a loaded bucket.
Although it is not possible to conclude that high levels of WBV exposure were the only cause of the reported neck and back discomfort, vibration levels experienced by the underground mining load-haul-dump ( LHD) operators indicated health risks were likely to develop, with a higher probability of injury to the back. Analysis of all operators’ injury profiles and their vibration profiles will be important in future studies in order to determine whether these variables are related. The mining industry will need to consider a number of different intervention strategies to have an impact on injury...
Le niveau vibratoire et sonore des équipements miniers n'est pas considéré lorsque vient le temps de choisir le matériel
Dans cette étude, plusieurs recommandations visant à réduire l’exposition des travailleurs miniers au bruit et aux vibrations sont formulées. Un total de 28 équipements miniers répartis dans 8 mines souterraines québécoises a été évalué. Pour les vibrations globales du corps, les équipements à risque élevé (pour une exposition quotidienne de 8 heures) sont les rétrocaveuses (sur rails et sur roues), l’opération d’une foreuse à béquille sur...
Bruit et vibrations, une combinaison dangereuse.
La perte auditive des travailleurs atteints des «doigts blancs» est plus marquée que celle de ceux non atteints. L'exposition au bruit et la durée de l'exposition sont associées à l'acquisition de la surdité. La présence des doigts blancs augmente le risque d'une augmentation de la perte auditive. Cette étude auprès de travailleurs forestiers montre des différences significatives à 500 et 1000 Hz. Source : Le bruit et les vibrations: une combinaison dangereuse. A. Turcot, S.-A. Girard et al. Dans Les...
Noise Control in Underground Metal Mining
This document is for operators, safety personnel, and mechanics in the mining industry who are not specialists in noise control engineering or acoustics. Evaluations of successful and unsuccessful attempts at controlling noise on several large, underground metal mining machines are detailed to illustrate the basic principles of noise control. Once personnel understand the guidelines and principles of noise control, they will be able to evaluate the extent of a noise problem; determine the best approach to the problem; and apply the most appropriate solution. Source :
Whole-body vibration in quarries
This information sheet outlines the risk of developing back pain from whole-body vibration (WBV) in quarrying and explains what you can do to reduce exposure to it. It should be read in conjunction with INDG242(rev1) Control back-pain risks from whole body vibration. Source: View HSE information sheet ‘Whole-body vibration in quarries'
NIOSH Develops New Software to Analyze and Reduce Noise Exposure
National Institute for Occupational Safety and Health (NIOSH) has been performing research to analyze and reduce hazardous noise exposure in mines.

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