EAR & EYE PROTECTION


“Damaged hair cells cannot be replaced or repaired by any known medical treatments or technology.”


Different groups of hair cells are responsible for different frequencies. Hazardous noise first affects the ability to hear high-frequency (high-pitched) sounds. Humans are most sensitive to sounds near 4000Hz (the frequency band for speech) and this is the area where most hearing loss occurs.


Noise induced hearing loss often leads to tinnitus or hyperacusis. Tinnitus is commonly described as a ringing in the ears and it may be soft or loud, high pitched or low pitched. Hyperacusis is characterised by over-sensitivity to certain frequencies.


Other dangers with hazardous noise are high blood pressure, stress, negative social effects, headache, depressions and irritation.


Exposure to certain ototoxic chemicals can also affect hearing. Many sectors with high exposures to noise also have high exposures to dangerous substances.


Some people are more sensitive to noise than others. High temperatures, exposure to vibrations or having a cold increase the risk of hearing damage.


www.hellbergsafety.com 22 www.tomorrowshs.com


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