Abstract
Hearing reduction and hearing loss are common among the industrial workers exposed to continuous and intensive occupational noise, although they are completely preventable[...]
Highlights
MethodsHearing reduction and hearing loss are common among the industrial workers exposed to continuous and intensive occupational noise, they are completely preventable
The numbers of workers presenting with different degree of hearing reduction at various noise intensity and according to the audiometric frequency in 2002 are shown on Figure 2 while those in 2009 - on Figure 3
At 61-70 dB, the number of workers examined at 500 Hz is significantly smaller than those at 4000 Hz (P
Summary
Hearing reduction and hearing loss are common among the industrial workers exposed to continuous and intensive occupational noise, they are completely preventable. Several recent investigations deal with the damage of the medium and inner ear as well as of the hearing characteristics caused by intensive and longlasting industrial noise, especially in construction in the USA (Wu, et al, 1998; Edelson, et al, 2009), in dockyards (Sliwinska-Kowalska, et al, 2004; Zamyslowska-Szmytke, et al, 2007), in a liquefied petroleum gas cylinder infusion factory in Taiwan (Chang, et al, 2009), in a semiconductor factory (Chou, et al, 2009), in steel mills, lumber mills and marble shops in Brazil (Boger, et al, 2009), among truck drivers (Krishnamurti, 2009; Karimi, et al, 2010), etc. The purpose of the present paper is to analyze the dynamics of hearing reduction of dockyard workers by twofold comprehensive screening examinations as a first step in a broad prevention programme
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