CAOHC EXAM STUDY QUESTIONS AND ANSWERS

Unit of measurement for frequency (pitch) - Answer-Hertz (Hz) Unit of measurement for intensity (loudness) - Answer-Decibel (dB) Risk of damage from noise - Answer-How loud (intensity) and how long (duration) Steady-state or continuous noise, e.g. generator - Answer-Lasts 1 second or longer Impulse or Impact noise, e.g. gunfire or nail gun - Answer-Lasts less than one second Parts of the outer ear - Answer-Pinna and external auditory canal Parts of the middle ear - Answer-Tympanic membrane, ossicles, eustachian tube Eustachian tube (auditory tube) - Answer-Tube connecting the middle ear to the pharynx and equalizes middle ear space with atmospheric pressure Conductive HL occurs here - Answer-Outer or middle ear Sensorineural hearing loss - Answer-Hearing loss resulting from damage to the inner ear (cochlea) or the auditory nerve Noise-induced hearing loss (NIHL) - Answer-Condition caused by the destruction of hair cells, the organs responsible for hearing, as a result of sounds that are "too long, too loud, or too close"; a sensorineural hearing loss Mixed hearing loss - Answer-Combination of conductive and sensorineural types in the same ear Middle ear bones (ossicles) - Answer-Malleus (hammer), incus (anvil), stapes (stirrup) Possible early symptoms/signs of noise induced hearing loss - Answer-Tinnitus; difficulty understanding in presence of background noise; read visual cues Auditory effects of noise - Answer-NIHL; tinnitus; hyperacusis Non-auditory effects of noise - Answer-annoyance sleep disturbance attention motivation stress reactions cardiovascular problems en