Hearing Loss Prevention

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Presentation transcript:

Hearing Loss Prevention

Hearing Loss Statistics 4 million workers go to work each day in damaging noise 10 million people in the U.S. have noise-related hearing loss 22 million workers are exposed to potentially damaging noise each year Hearing loss accounts for 14% of occupational illness

Sound Sound is measured in two variable Frequency – High or low pitch Intensity – Level of loudness measured in decibels (dB) Noise Level Survey Industrial Standard for noise level exposure Duration per day, hours Sound level dB slow response 8.................................|......... 90 6.................................|......... 92 4.................................|......... 95 3………………….|…… 97 2.................................|......... 100 1.................................|........ 105 1/2 .............................|......... 110

TYPES OF HEARING LOSS Noise-induced hearing loss - gradual permanent loss of hearing due to continuous high level noise exposure Sudden hearing loss – viral infections, acoustic trauma, & vascular Age-related hearing loss - gradual loss due to aging Congenital hearing loss - present at birth due to genetics Ototoxic hearing loss – caused by exposure to certain drugs & toxic agents Temporary Threshold Shift (TTS) – a temporary reduction in hearing due to fatigue of the ear caused by noise exposure Standard Threshold Shift (STS) – a change in hearing sensitivity for the worse Acoustic trauma – immediate hearing loss from exposure to an extremely loud event All types can collectively contribute towards the severity of hearing loss

Personal Protective Equipment Many types of PPE available for hearing protection Ear plugs Semi-insert ear plugs Ear muffs “Dual protection” Employees should wear a hearing protector if the noise or sound level at the workplace exceeds 85 decibels. Hearing protectors reduce the noise exposure level and the risk of hearing loss. The effectiveness of hearing protection is reduced greatly if the hearing protectors do not fit properly or if they are worn only part time during periods of noise exposure. To maintain their effectiveness, they should not be modified.