CAOHC knowledge check Latest Update 2024- 2025 Questions and 100% Verified Correct Answers Guaranteed A+ At First Attempt
A COHC is NOT able to train other OHCs to do manual testing, to be a Professional Supervisor, or: - CORRECT ANSWER: diagnose hearing problems or interpret audiograms
A daily check of equipment which involves both a visual and listening check is a: -
CORRECT ANSWER: functional check
A decibel (dB) Is the unit of measurement for: - CORRECT ANSWER: Intensity
A professional supervisor's role will typically include oversight of the audiometric testing program, review of problem audiograms, and: - CORRECT ANSWER: determining work-relatedness of hearing loss
A pulsed tone should be presented for: - CORRECT ANSWER: 1-2 seconds, 2-3 pulses
A self-check of earplugs should always include a visual check, and at least one additional self check depending on the earplug type, which might include a tug test on earplug with a stem, and a listening check such as: - CORRECT ANSWER: cupping handover both ears with both ear plugs inserted to see if noise in room remains constant and counting out loud with both your plugs inserted while listening for voice changes which should include lower pitch voice that is heard in the middle
A subjective rule for determining if your environment is potentially hazardous is the: -
CORRECT ANSWER: 3-foot rule
A(n) calibration is done annually; an involves some adjustments and should be done at least every 2 years: - CORRECT ANSWER: electroacoustic; exhaustive
A(n) calibration should be performed immediately after annual calibration and then daily when in use: - CORRECT ANSWER: biological
adding together two identical noise sources of 100 dBA each will result in a total of: -
CORRECT ANSWER: 103 dBA
Advantages of a manual audiometer are greater examiner controls, and: - CORRECT
ANSWER: best for difficult-to-test patients
ADVANTAGES of a microprocessors audiometer are less examiner errors, requires little skill, and: - CORRECT ANSWER: can test multiple patients
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ADVANTAGES of formable earplugs are they are compatible with Personal Protective Equipment (PPE), comfortable, and: - CORRECT ANSWER: inexpensive
ADVANTAGES of noise muffs are they are easy to fit, easier to monitor, and are . -
CORRECT ANSWER: consistent with their attenuation
ADVANTAGES of pre-molded earplugs are they are inexpensive, compatible with personal protective equipment, and: - CORRECT ANSWER: ideal for dirty environments
An employee must be notified in writing of an STS within days. - CORRECT ANSWER: 21
An OSHA-recordable STS must be determined to be work related, have an average 10 dB shift at 2000, 3000, and 4000 Hz in either or both ears, and also a: - CORRECT ANSWER: 25 dB or worse average hearing level on current audio at 2000, 3000, and 4000 Hz in the same ear
At the Action Level (AL) the requirements for enrolled employees are annual hearing testing and education, hearing protection made available, and: - CORRECT ANSWER: hearing protection must be worn be those who have incurred an STS
AUDITORY effects of noise exposure include noise-induced hearing loss, hyperacusis, and: - CORRECT ANSWER: tinnitus
CAOHC's primary objective is to: - CORRECT ANSWER: educate, inform, and guide industry and the serving industry on successful implementation of HCPs
Dual protection provides an additional dB of protection: - CORRECT ANSWER: 5 (dB)
Early signs/symptoms of a noise-induced hearing loss include tinnitus, difficulty understanding in background noise, and: - CORRECT ANSWER: need for visual cues
Encouraging management to do this reduces compensation claims: - CORRECT
ANSWER: Adopt best practices
Frequency is perceived as pitch, is measured in Hertz (Hz), and: - CORRECT
ANSWER: more cycles per second indicate a high frequency sound
Graphic audiometric symbols for right ear is and left ear is . - CORRECT ANSWER: red O; blue X
Hearing loss due to aging: - CORRECT ANSWER: presbycusis
Hearing protection must bring employee's exposure level below: *** - CORRECT
ANSWER: 90 dBA
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