CAOHC Study Set Questions and Answers Rated A+

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