The John Deere 2500E hybrid greens mower combines
electrical reel system allows the cutting units to be
conventional diesel power with electric motors to produce a quieter, more environmentally friendly machine. Its advanced
powered independently of the traction speed enabling the operator to reduce engine rpm without slowing reel rpm or mowing speed, thus reducing sound levels down to 79dBA
and tinnitus (ringing in the ears) from occupational noise such as machinery, sustained traffic and other noise hazards. The warning comes from charity Deafness Research UK, which adds that danger exists where workers are regularly exposed to high levels of noise, generally 80dBA or more. Workers in the landscape industry are at particular risk because most outdoor machinery is used at close range and is likely to be in excess of 85dBA, the charity cautions.
“It’s not just the loudness of the noise that determines whether your hearing is at risk,” Deafness Research UK’s Vivienne Michael adds. “The length of time you are exposed to it is important
too. So, while your ears might safely tolerate a level of 80dBA for up to eight hours, when the noise level doubles, our toleration reduces to four hours. “By 100dBA, our tolerance without ear
protection is just a few minutes. And always after being in a noisy place, our ears need a quiet rest afterwards. However, no two people will have an identical tolerance to noise”, she says. Research suggests that a genetic predisposition towards hearing loss is an important factor.
Survey findings published by Deafness
Research UK show that almost 20% of tinnitus sufferers believe that their noisy working environment was the single most important factor in them developing the
condition.
Ian Sumpter is keen to reinforce the necessity for people working in the industry to use the required protection and also ensure they are always aware of the machine they are using, warning against the use of personal music players while operating machinery. “We always recommend iPods and the
like are not used while operating machinery,” he says. “If music is listened to, it is normally under protective ear defenders rather than instead of them. It is always best practice, however, to be able to hear the machine operating so that any change in pitch of engine or cutting units can be picked up as soon as possible, as this is often indicative of a
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