CAOHC Bold Items Exam Questions with Correct Answers

CAOHC Bold Items Exam Questions with Correct Answers What does CAOHC stand for? - Answer-Council for the Accreditation in Occupational Hearing Conservation Main role of CAOHC - Answer-To certify and train Occupational Hearing Conservationists (OHC) OHCS must be recertified within years of initial certification. - Answer-Five Tinnitus - Answer-Technical term for ringing or other noises in the ears. Interference with communication, degraded job performance, stress and annoyance/fatigue - Answer-Problems caused by noise in addition to hearing loss When is the best time to perform a baseline audiogram? - Answer-14 hours away from noise exposure, preferably before starting work. When is the best time to perform an annual audiogram? - Answer-Well into the work shift, near the end of the day. In what part of the auditory system does a sensorinerual hearing loss occur in? - Answer-The inner ear or cochlea or the nerve of hearing Besides noise, one of the most frequent contributors to sensorineural hearing loss is: - Answer-Presbycusis or the hearing loss from aging The aspect of sound that is perceived as loudness is called and is quantified in terms of . - Answer-Intensity; Decibels A sound's frequency is perceived by the ear as and quantified in terms of . - Answer-Pitch; Hertz The logarithmic average sound exposure level normalized to an 8-hour workday is called the: - Answer-Time Weighted Average exposure level (TWA) The relationship between level and duration of an allowable noise exposure is called: - Answer-The Exchange Rate OSHA and DOD use a DB exchange rate. - Answer-5 NIOSH uses a DB exchange rate. - Answer-3 Difference between OSHA and NIOSH - Answer-Enforcement versus research/best practice. OSHA's noise regulation calls for a PEL of DBA, an exchange rate of DB, and an action level of DBA. - Answer-90; 5; 85 According to the OSHA regulation, what must employees and employers do if the PEL is exceeded? - Answer-Consider Engineering controls, administrative controls, use hearing protection. Which is the most delicate part of the audiometric system? - Answer-Headphones What are the advantages and disadvantage of manual testing? - Answer-Least expensive; Controlled by examiner and operator error. What are the air conduction symbols for the left and right ear? - Answer-X for left and O for right What is the most common audiometric configuration for people who work in noisy environments? - Answer-High frequency sloping sensorineural hearing loss When should the calibration of sound measuring equipment be checked? - Answer- Before and after use. Before taking any measurements, what are three indications that noise levels in the work environment are greater than 85 DBA? - Answer-Difficulty communicating at three feet, tinnitus, dullness of hearing or temporary threshold shift. When OSHA considers the combination of an earmuff with an earplug, what is the increase in attenuation assumed to be over the protector with the higher attenuation? - Answer-5 DB What is the name of the effect when a person's own voice sounds amplified/hollow when wearing a hearing protector? - Answer-Occlusion effect In what condition is Occlusion effect most pronounced? - Answer-When earplugs are not deeply inserted into ear canals.