CAOHC Exam Study Guide With Complete Solutions

CAOHC Exam Study Guide With Complete Solutions purpose of the OHC: - answerproviding resources and guidance to facilitate hearing loss prevention through standardized training what are the federal regulators with a hearing conservation policy? - answer- OSHA - MSHA - FRA - DoD * NIOSH recommends but doesn't regulate! difference between OSHA and NIOSH: - answerNIOSH refers to research and recommendations. OSHA regulates and implements. non-auditory effects on hearing: - answerstress high blood pressure cardiovascular problems endocrine problems potential sources of hazardous noise in occupational work settings: - answermachinery, construction, railroads, mining, manufacturing, farming, professional musician potential sources of hazardous noise in non-occupational work settings: - answermotorcycles, guns, carpentry equipment, lawnmowers, personal listening devices the "do's" of an OHC: - answereducation, fitting hearing protection, hearing tests, and counseling the "don'ts" of an OHC: - answerdiagnose and supervise who can be professional supervisors? - answeraudiologists and physicians which occupational population is most at risk for NIHL and has the highest amount of claims? - answermanufacturing accounts for 14% of the U.S. workforce but accounts for 80% of NIHL incidence early state indication of NIHL is identified at which frequencies? - answer3K, 4K, and 6kHz general configuration of conductive hearing loss: - answerflat and often worse at low frequencies what would be an indication of an advanced stage of NIHL? - answernotch configuration progressing to a high-frequency slope symptoms of SNHL: - answerdifficulty discriminating speech or tinnitus symptoms of CHL: - answerfullness, pressure, or muffled hearing peripheral functions are associated with the: - answercochlea what is the audible frequency range at birth? - answer20-20,000 Hz what dB level is action level and what does it require? - answer85 dB requires implementation of a hearing conservation program and inclusion in the program 1.________ is referred to as the low threshold level and is used to determine if inclusion in an HCP is warranted 2.________ is referred to as the high threshold level and is used to determine compliance with the permissible exposure level - answer1. TL = 80 dBA 2. TL = 90 dBA what dB level is the permissible exposure level? - answer90 dB 1.________ is 100% dose 2.________ is 50% dose - answer1. 90 dBA (PEL) for 8 hours 2. 85 dBA (AL) for 8 hours *OSHA* what is the PEL range and AL range/criterion? - answer- PEL: 90-140 dB - AL: 80-130 dB range, 85-130 dB criterion what is the average level? - answerthe level if presented continuously would generate the same amount of energy as the varying levels in the environment level average (Lavg): - answerthe average sound level over a sample of time level equivalent (Leq): - answerthe average sound level measured over the run time but is calculated with a 3 dB exchange rate what does noise dose mean? - answer- represented as a percentage - the allowable daily exposure va