CAOHC TEST QUESTIONS AND ANSWERS

CAOHC TEST QUESTIONS AND ANSWERS 2023 -2024 What is the purpose of the OHC? - ANSWER Providing resources and guidance to facilitate the practice of hearing loss prevention through standardized training and credentialing What is the difference between the requiremtns of OSHA and the recommendations of NIOSH? - ANSWER NIOSH refers to research and recoomendations. OSHA regulates and implements. What are examples of auditory effects on hearing and damage risks? - ANSWER Tinnitus and hearing loss What are non auditory effects on hearing and damage risks? - ANSWER Stress, high blood pressure What are potential sources of hazardous noise in occupational work settings? - ANSWER Machinery, constructino, railoroads and equipment, mining, manufacturing, farming, professional musician What are potential sources of hazardous noise in non occupational work settings? - ANSWER Motorcycles, sporting guns, carpentry equipment, lawn equipment, personal listening devices What are some of the lasting effects of noise induced hearing loss? - ANSWER Social withdrawal, frustration, anger, and effects on private life What are the "do's" of an OHC (hearing tech)? - ANSWER Education, fitting hearing protection, hearing test, and counciling What are the don'ts of an OHC (hearing tech)? - ANSWER Diagnose, supervise Who can be Professional Supervisors? - ANSWER Audiologists and physicians How many workers are exposed to hazardous noise on the job? - ANSWER 22 million plus What occupational population is most at risk for noise induced hearing loss which highest amount of claims? - ANSWER Manufacturing accounts for approximately 14% of U.S workforce but accounts for approximately 80% of incidence of NIHL. Collects sound waves, localizes sounds waves, protects middle ear components and provides resonate amplication is the function of what part of the ear? - ANSWER Outer ear Acoustic transformer, impedance matching system, provides pressue equalization, and protects the inner ear is the function of what part of the ear? - ANSWER Middle ear Provides intensity, frequency and temporal coding that is relayed via the auditory nerve for further processing is the function of what part of the ear? - ANSWER Inner ear An early stage indication of noise induced hearing loss is identified typically at which frequencies on an audiogram? - ANSWER 3-6 kHz What is a general rule of conductive hearing loss? - ANSWER Flat and often worse at low frequencies What would be an indication of an advanced stage noise induced hearing loss? - ANSWER A notch configuration progressing to a high-frequency slope Mixed hearing loss is a combination of what? - ANSWER Conductive and sensorineural components What is a symptom of sensorineural hearing loss? - ANSWER Difficulty discriminating speech or tinnitus What is a symptom of conductive hearing loss? - ANSWER Fullness, pressure, muffled hearing and clarify when sound is loud enough Peripheral functions are those associated with the? - ANSWER Cochlea Conductive disorders are typical to which site of lesion, in contrast to NIHL? - ANSWER Outer and middle ear Serial audiogram configurations typically shows: - ANSWER Numerical What is the audible frequency range at birth? - ANSWER 20-20,000 Hz low/high requency Hz is subjectively interpreted as what? - ANSWER Low and high pitch Frequecy is subjectively interpreted as? - ANSWER Pitch and the number of cycles per second