CAOHC Study Set With Complete Solution

Manufacturing - Answer Which occupational sector accounts for the highest incidence of noise-induced hearing loss? Tinnitus - Answer A buzzing or ringing in the ears is known as Three - Answer Noise exposures are considered likely to be harmful if shouting is required in order to communicate to a person __________ feet away Painless, Progressive, Permanent, Preventable - Answer What are the four P's of Noise-Induced Hearing Loss 140 dBP - Answer Impulse noise becomes hazardous at Frequency - Answer Hertz (Hz) is used to measure Pitch - Answer The frequency of sound is perceived as Decibels (dB) - Answer The amplitude/intensity of a sound is measured in Exchange rate - Answer What reflects the relationship between the allowable exposure time and the noise intensity level? 90/85 - Answer OSHA prescribes a permissible exposure limit (PEL) of __________ dBA TWA and the DoD prescribes a PEL of __________ A - Answer Workplace hazard surveys are completed using the __________ weighting scale 85/85 - Answer OSHA prescribes an action level of __________ dBA TWA and DoD prescribes an action level of __________ engineering - Answer Adding a muffler to noisy equipment to reduce noise exposure is an example of what kind of control? 250-4000 Hz - Answer Human speech is located in this range of hearing malleus, incus, stapes - Answer What are the three bones of the middle ear? 8 - Answer Time Weighted Average is based on an __________ hour exposure use and use correctly - Answer The best hearing protection is the one that you __________ Presbycusis - Answer Aging related hearing loss is known as NIOSH - Answer The organization responsible for conducting research and making recommendations for best/recommended practices preventable - Answer NIHL is Daily - Answer Biological calibration checks must be performed how often? Sensorineural - Answer A noise notch found in audiogram results is indicative of what type of hearing loss? Conductive - Answer Impacted cerumen can cause this type of hearing loss Inner ear - Answer Sensorineural hearing loss affects what part of the ear? 5 - Answer OHCs must be recertified every __________ years 3/5 - Answer The DoD uses a __________ dB time-intensity exchange rate where OSHA prescribes a __________ dB time-intensity exchange rate 500 - Answer Excessive background noise in the test area generally affects the threshold at __________ Hertz (Hz) the most 50% - Answer The hearing threshold level is defined as the point where the subject hears the tone __________ of the time