Chapter 1-2 CAOHC Study Guide
10 million - ANS-how many people in the US have noise-related hearing loss (according to
NIOSH)
22 million - ANS-how many workers are exposed to potential damaging noise each year
(according to NIOSH)
painless, permanent, progressive, and preventable - ANS-the four P's of noise-induced hearing
loss
noise - ANS-any auditory stimulus intense enough to cause hearing loss in the human hearing
mechanism
noise notch - ANS-a noticeable dip primarily at 4000 Hz with subsequent improvement in
hearing in the high frequencies
TTS - ANS-temporary threshold shift or a temporary decrease in hearing sensitivity
3 federal hearing conservation regulation standards - ANS-- Occupational Safety and Health Act
(OSHA) - 29 CFR 1910.95
- Federal Coal Mine and Safety Act (MSH) - 30 CFR Part 62
- Occupational Noise Exposure for Railroad Operating Employees (FRA) - 49 CFR 227 & 229
noise measurement
engineering and administrative controls
monitoring audiometry
hearing protection
employee training
recordkeeping
program evaluation - ANS-the 7 components of a hearing conservation program
physical characteristics of sound - ANS-a wave generated by pressure changes of the particles
in elastic mediums such as air, fluids, or solids
air conduction sound wave compression phase - ANS-outward movement of tuning fork causing
area of high pressure of air molecules
air conduction sound wave rarefaction phase - ANS-opposite movement of tuning fork causing
an area of low pressure of air molecules
sound wave cycle - ANS-completion of one compression phase and one rarefaction phase
10 million - ANS-how many people in the US have noise-related hearing loss (according to
NIOSH)
22 million - ANS-how many workers are exposed to potential damaging noise each year
(according to NIOSH)
painless, permanent, progressive, and preventable - ANS-the four P's of noise-induced hearing
loss
noise - ANS-any auditory stimulus intense enough to cause hearing loss in the human hearing
mechanism
noise notch - ANS-a noticeable dip primarily at 4000 Hz with subsequent improvement in
hearing in the high frequencies
TTS - ANS-temporary threshold shift or a temporary decrease in hearing sensitivity
3 federal hearing conservation regulation standards - ANS-- Occupational Safety and Health Act
(OSHA) - 29 CFR 1910.95
- Federal Coal Mine and Safety Act (MSH) - 30 CFR Part 62
- Occupational Noise Exposure for Railroad Operating Employees (FRA) - 49 CFR 227 & 229
noise measurement
engineering and administrative controls
monitoring audiometry
hearing protection
employee training
recordkeeping
program evaluation - ANS-the 7 components of a hearing conservation program
physical characteristics of sound - ANS-a wave generated by pressure changes of the particles
in elastic mediums such as air, fluids, or solids
air conduction sound wave compression phase - ANS-outward movement of tuning fork causing
area of high pressure of air molecules
air conduction sound wave rarefaction phase - ANS-opposite movement of tuning fork causing
an area of low pressure of air molecules
sound wave cycle - ANS-completion of one compression phase and one rarefaction phase
