The influence of noise
Most people do not know that once a person lost his or her hearing, the condition is irreversible. No medical practitioner can repair it. At best, a hearing aid could assist in improving the little bit left, and believe me, when you are deaf, the world changes.
When one works in a condition where the noise level exceeds 85.0 decibel as measured on the A scale, (dB(A)) you risk contracting noise induced hearing loss (NIHL.) The safe level of 85 dB(A) cannot be exactly determined without a calibrated noise measuring instrument, but can be safely determined to be that level where one can have a conversation without raising your voice.
There is no risk of NIHL below 85.0 dB(A). Thus, you can safely work for eight hours (or 480 minutes) per day without risk. Should your noise exposure level increases to 88 dB(A), the risk time is halved, and halved again for every further 3 dB(A).
Unfortunately the poor youngster in his motor vehicle or the taxi driver does not know about this. Some of the vehicles that pass me regularly seem to be sound driven, as you can hear them coming from a mile. The persons inside will surely be in need of a hearing aid shortly, though they will realise it too late, just because of negligence.
The same goes for DJ’s or night club owners, heavy industry workers and others that need to work in noisy environments.
If you need more info on this subject, call NatureBound 011 412 1888Francois Graaff