CAOHC Test Questions Answered Correctly – Expert Verified | Latest Version 2024/2025

0 dB HL does not mean what? - It does not mean that there is no sound at that level 0-25dB HL represents what? - Normal hearing range 90 dB HL represents what? - Typically the highest output level on a pure tone air conduction screening audiometer A laboratory value assigned to the individual porduct and not a reflection of what kind of attenuation the worker will ultimately recieve is called? - NRR Acoustic calibrations must be done? - Yearly Acoustic transformer, impedance matching system, provides pressue equalization, and protects the inner ear is the function of what part of the ear? - Middle ear An early stage indication of noise induced hearing loss is identified typically at which frequencies on an audiogram? - 3-6 kHz Background noise can affect what? - Low frequencies 500 Hz and below