NBC-HIS UPDATED Questions and
CORRECT Answers
• - CORRECT ANSWER - Q: What is the normal range of human hearing in Hz?
A: 20 Hz to 20,000 Hz - CORRECT ANSWER -
What is the normal range of human hearing in Hz? - CORRECT ANSWER - 20 Hz to
20,000 Hz
What does dB HL stand for? - CORRECT ANSWER - Decibels Hearing Level
What is the function of the cochlea? - CORRECT ANSWER - To convert sound waves
into electrical signals sent to the brain
What does air conduction testing evaluate? - CORRECT ANSWER - The entire auditory
system, including outer, middle, and inner ear
What does bone conduction testing bypass? - CORRECT ANSWER - The outer and
middle ear
What is the purpose of masking in audiology? - CORRECT ANSWER - To isolate the test
ear by preventing the non-test ear from participating
What is the minimum interaural attenuation for supra-aural headphones? - CORRECT
ANSWER - 40 dB
What does the SRT (Speech Reception Threshold) measure? - CORRECT ANSWER -
The lowest level at which speech can be understood 50% of the time
, What does the word recognition score evaluate? - CORRECT ANSWER - The ability to
understand speech at a comfortable loudness level
What is recruitment? - CORRECT ANSWER - An abnormal growth in loudness, often
seen in sensorineural hearing loss
What causes conductive hearing loss? - CORRECT ANSWER - Blockage or damage in
the outer or middle ear
What causes sensorineural hearing loss? - CORRECT ANSWER - Damage to the cochlea
or auditory nerve
What is mixed hearing loss? - CORRECT ANSWER - A combination of conductive and
sensorineural hearing loss
What are common causes of sensorineural hearing loss? - CORRECT ANSWER - Aging,
noise exposure, ototoxic drugs, and genetics
What hearing loss type typically benefits most from hearing aids? - CORRECT
ANSWER - Sensorineural hearing loss
What audiogram shape is associated with presbycusis? - CORRECT ANSWER - Sloping
high-frequency loss
What is the significance of the air-bone gap? - CORRECT ANSWER - Indicates the
presence of conductive hearing loss
What type of hearing loss might show normal tympanometry results? - CORRECT
ANSWER - Sensorineural hearing loss
CORRECT Answers
• - CORRECT ANSWER - Q: What is the normal range of human hearing in Hz?
A: 20 Hz to 20,000 Hz - CORRECT ANSWER -
What is the normal range of human hearing in Hz? - CORRECT ANSWER - 20 Hz to
20,000 Hz
What does dB HL stand for? - CORRECT ANSWER - Decibels Hearing Level
What is the function of the cochlea? - CORRECT ANSWER - To convert sound waves
into electrical signals sent to the brain
What does air conduction testing evaluate? - CORRECT ANSWER - The entire auditory
system, including outer, middle, and inner ear
What does bone conduction testing bypass? - CORRECT ANSWER - The outer and
middle ear
What is the purpose of masking in audiology? - CORRECT ANSWER - To isolate the test
ear by preventing the non-test ear from participating
What is the minimum interaural attenuation for supra-aural headphones? - CORRECT
ANSWER - 40 dB
What does the SRT (Speech Reception Threshold) measure? - CORRECT ANSWER -
The lowest level at which speech can be understood 50% of the time
, What does the word recognition score evaluate? - CORRECT ANSWER - The ability to
understand speech at a comfortable loudness level
What is recruitment? - CORRECT ANSWER - An abnormal growth in loudness, often
seen in sensorineural hearing loss
What causes conductive hearing loss? - CORRECT ANSWER - Blockage or damage in
the outer or middle ear
What causes sensorineural hearing loss? - CORRECT ANSWER - Damage to the cochlea
or auditory nerve
What is mixed hearing loss? - CORRECT ANSWER - A combination of conductive and
sensorineural hearing loss
What are common causes of sensorineural hearing loss? - CORRECT ANSWER - Aging,
noise exposure, ototoxic drugs, and genetics
What hearing loss type typically benefits most from hearing aids? - CORRECT
ANSWER - Sensorineural hearing loss
What audiogram shape is associated with presbycusis? - CORRECT ANSWER - Sloping
high-frequency loss
What is the significance of the air-bone gap? - CORRECT ANSWER - Indicates the
presence of conductive hearing loss
What type of hearing loss might show normal tympanometry results? - CORRECT
ANSWER - Sensorineural hearing loss
