NBC HIS 2025/2026 QUESTIONS WITH SOLUTIONS RATED
A+
✔✔head shadow effect - ✔✔the loss of intensity of a sound as the sound travels around
the head
✔✔binaural squelch effect - ✔✔an improvement in listening in noise when wearing two
hearing aids instead of one, resulting a 2-to-3-dB improvement in signal-to-noise ratio
✔✔what are the benefits of hearing binaurally? - ✔✔localization and hearing better in
background noise
✔✔the place theory of hearing - ✔✔the theory that different areas of the basilar
membrane respond to different frequencies. base-high tones; apical-low tones
✔✔12. The fluid that circulates throughout the scala vestibuli and the scala tympani is
__________ and the fluid that circulates throughout the scala media is __________ . -
✔✔perilymph; endolymph
✔✔binaural fusion - ✔✔ability to understand and process two different messages
presented simultaneously
✔✔binaural summation - ✔✔the increase of loudness of sounds when both ears hear
together
✔✔noise-induced hearing loss - ✔✔Hearing loss or impairment resulting from exposure
to loud sound.
✔✔presbycusis - ✔✔age related hearing loss
✔✔phonemic regression - ✔✔poor auditory comprehension often associated with
advanced age
✔✔acoustic neuroma - ✔✔benign tumor on the auditory nerve (8th cranial nerve) that
causes vertigo, tinnitus, and hearing loss
unilateral loss, asymmetrical word recognition score present with symmetric hearing,
WR inconsistent with PTA
✔✔ototoxin - ✔✔Ototoxic medications known to cause permanent damage include
certain aminoglycoside antibiotics, such as gentamicin and cancer chemotherapy drugs,
such as cisplatin and carboplatin.
A+
✔✔head shadow effect - ✔✔the loss of intensity of a sound as the sound travels around
the head
✔✔binaural squelch effect - ✔✔an improvement in listening in noise when wearing two
hearing aids instead of one, resulting a 2-to-3-dB improvement in signal-to-noise ratio
✔✔what are the benefits of hearing binaurally? - ✔✔localization and hearing better in
background noise
✔✔the place theory of hearing - ✔✔the theory that different areas of the basilar
membrane respond to different frequencies. base-high tones; apical-low tones
✔✔12. The fluid that circulates throughout the scala vestibuli and the scala tympani is
__________ and the fluid that circulates throughout the scala media is __________ . -
✔✔perilymph; endolymph
✔✔binaural fusion - ✔✔ability to understand and process two different messages
presented simultaneously
✔✔binaural summation - ✔✔the increase of loudness of sounds when both ears hear
together
✔✔noise-induced hearing loss - ✔✔Hearing loss or impairment resulting from exposure
to loud sound.
✔✔presbycusis - ✔✔age related hearing loss
✔✔phonemic regression - ✔✔poor auditory comprehension often associated with
advanced age
✔✔acoustic neuroma - ✔✔benign tumor on the auditory nerve (8th cranial nerve) that
causes vertigo, tinnitus, and hearing loss
unilateral loss, asymmetrical word recognition score present with symmetric hearing,
WR inconsistent with PTA
✔✔ototoxin - ✔✔Ototoxic medications known to cause permanent damage include
certain aminoglycoside antibiotics, such as gentamicin and cancer chemotherapy drugs,
such as cisplatin and carboplatin.
