Goshorn Industrial Final Exam Questions with 100% Correct Answers Latest (Solved)

Goshorn Industrial Final Exam Questions with 100% Correct Answers Latest (Solved) What does CAOHC stand for? - answers-Council for Accreditation of Occupational Hearing Conservation True or False: The OHC can be responsible for the diagnosis of hearing problems. - answers-False Name at least 6 activities the OHC is trained to carry out. - answers-Take noise measurements perform hearing screenings refer to audiologists/physicians Collect medical history Perform a visual ear inspection Maintain the Audiometer True or False: Noise induced hearing loss can be reversed by medical treatment. - answers-False TTS stands for _______ and the OHC needs to catch these hearing losses before they become _______. - answers-Temporary Threshold Shift Goshorn Industrial Final Exam Questions with 100% Correct Answers Latest 2024- 2025 (Solved) Permanent Threshold Shifts Name at least 3 agents besides noise that are toxic to the ear, especially when combined with noise exposure. - answers-Heavy metals (lead, trimethyltin) Organic solvents (toulene, xylene) Asphyxiants (CO) What are 3 of the most useful abilities of human hearing? - answers-Communication, perception of warnings, diagnosing the sound of a machine malfunction Inside the middle ear are situated three small bones called the ossicles, whose names are _______, _______, and _______. The function of the ossicular chain is to _______. - answers-Malleus, Incus, Stapes Conduct sound vibrations from the tympanic membrane to the middle ear. In the inner ear, the snail-shaped end organ for hearing is the _______. - answers-Cochlea Noise exposed people tend to lose hearing first for the _________ tones. - answers-High frequency Under what conditions will the OHC need to diagnose hearing disorders? - answers-If they are a properly trained and certified audiologist or physician. Give 3 examples of outer or middle ear conditions that could cause a conductive hearing loss. - answers-Otitis externa, otitis media, impacted cerumen Under what conditions should a worker refrain from wearing earplugs? - answers-If they show symptoms of external otitis Name at least 5 possible causes of sensorineural hearing loss other than noise. - answers-Presbycusis, ototoxic drugs, genetics, prenatal infection, acoustic neuroma Why is it important for the OHC to identify a one-sided hearing loss and refer the individual to an ear specialist if he or she has not already received an examination for this condition? - answers-These results could be indicative of an acoustic neuroma True or False: A hearing aid can restore hearing to normal. - answers-False If the air molecules themselves do not move very far, what is it that does travel, sometimes long distances? - answers-The energy created by the sound pressure wave. Why was 20 uPa chosen as the zero reference level for the sound level meter? - answers-20 uPa is the smallest amount of sound pressure that can be detected by a normal ear. What are the three most important properties of noise when hearing loss is considered? - answers-Frequency, intensity, and time Most occupational noise exposures fluctuate in level during the work shift. The logarithmic average sound exposure level normalized to an 8-hour day is called the _______ exposure level, abbreviated _______. - answers-8-hour time-weighted average TWA The relationship between level and duration of an allowance noise exposure is called the _________. - answers-exchange rate What are the three main purposes of noise measurement in the occupational setting? - answersIdentify overexposed workers; asses noise problems; measure background levels in the audiometer rooms The integrating SLM and noise dosimeter average sound levels _______. - answers-Logarithmically For most purposes OSHA requires the _______ (fast or slow) meter response. - answers-Slow True or False: When measuring the peak sound pressure level of an industrial impulse, one should use the sound level meter's "impulse" setting. - answersFalse What is the purpose of the octave band filter set? - answers-To measure sound levels at particular frequencies True or False: OSHA requires the integration of impulse noise into the assessment of worker noise dose. - answers-True Both OSHA and MSHA require the integration of all sound levels between _______ dBA and _______ dBA to comply with the action level. - answers-85 130 Before taking any measurements, what are 3 indications that noise levels in the work environment exceed 85 dBA? - answers-Difficulty communicating at 3 feet Tinnitus TTS Large volume earmuffs provide somewhat more attenuation in the _______ frequencies than the smallvolume type. - answers-Low and mid When OSHA considers the combination of an earmuff with an earplug, what is the increase in attenuation assumed to be over the protector with the higher attenuation? - answers-5 dB An active hearing protector uses _______ to allow the passage of low and moderate levels of sound into the ear canal while attenuating high sound levels. - answers-Electronic circuitry True or False: Although earmuffs do not come in a variety of sizes, they must still be fitted to individual wearers. - answers-True Earmuffs may cause difficulties in localizing sounds, particularly in the ________ plane. - answers-vertical Hearing protectors with _______ attenuation can make communication easier than protectors that attenuate heavily in the high frequencies. - answers-Flat