Audiology UPDATED Questions and
CORRECT Answers
outer ear two structures - CORRECT ANSWER - 1. the pinna, or auricle
2. the external auditory meatus (ear canal)
1. pinna
2. ear canal - CORRECT ANSWER - The outer ear is made up of two structures
pinna - CORRECT ANSWER - - is the visible part of the auditory system and is shaped
like a funnel. -
it is composed of skin overlaying stiffer cartilage along with a fleshier lobe and is attached to the
cranium by ligaments.
- the funnel shape gives rise to it's basic function: to collect and send sound waves through the
ear canal.
- it also assists in sound localization and helps to protect the entrance to the external auditory
canal.
cerumen - CORRECT ANSWER - is waxy and somewhat sticky which aids in keeping the
ear canal moisturized and clean of debris that could accumulate
external auditory meatus - CORRECT ANSWER - - is a tube that runs from the pinna to
the ear drum (tympanic membrane)
- 6mm long in children
- 23-29mm long in adult
- lined with epithelium (skin) and tiny hairs (cilia)
- contains glands in the cartilaginous portions that produce earwax (cerumen)
external canal 2 functions - CORRECT ANSWER - 1. to protect the delicate middle and
inner ear from foreign bodies that could damage these structures
, 2. along with contra, it boosts the amplitude of high frequency sounds.
The concha and the ____________ have a natural resonant frequency.
natural frequency - CORRECT ANSWER - is the frequency in which something responds
or vibrates best to
10 to 15 db - CORRECT ANSWER - - when frequencies enter the canal and are close to
or at the resonant frequency of the canal, they get an automatic boost of _____________.
- fricatives/ high frequencies get that boost.
- the boost enables us to localize
- this helps to create timing differences between the two ears which gives cues to where the
sounds are
middle ear - CORRECT ANSWER - - the external auditory meatus terminates
- the membrane acts as a boundary for this part of the ear....
tympanic membrane - CORRECT ANSWER - - the membrane acts as the anatommic
boundary between the outer and middle ear
- is comprised of mutiple layers of tissue: epithelial, medial membranous, fibrous
tympanic membrane layers - CORRECT ANSWER - - epithelial layer
- medial membranous layer
- fibrous layer (this layer is between top two)
medial layer of TM - CORRECT ANSWER - is contiguous with the membranous lining of
the middle ear cavity that is lined with mucous membrane
TM 2 sections - CORRECT ANSWER - - pars flaccida: which is located superiorly and as
the name suggests is flacid
- pars tensa - larger section, more stiff, located inferiorly
CORRECT Answers
outer ear two structures - CORRECT ANSWER - 1. the pinna, or auricle
2. the external auditory meatus (ear canal)
1. pinna
2. ear canal - CORRECT ANSWER - The outer ear is made up of two structures
pinna - CORRECT ANSWER - - is the visible part of the auditory system and is shaped
like a funnel. -
it is composed of skin overlaying stiffer cartilage along with a fleshier lobe and is attached to the
cranium by ligaments.
- the funnel shape gives rise to it's basic function: to collect and send sound waves through the
ear canal.
- it also assists in sound localization and helps to protect the entrance to the external auditory
canal.
cerumen - CORRECT ANSWER - is waxy and somewhat sticky which aids in keeping the
ear canal moisturized and clean of debris that could accumulate
external auditory meatus - CORRECT ANSWER - - is a tube that runs from the pinna to
the ear drum (tympanic membrane)
- 6mm long in children
- 23-29mm long in adult
- lined with epithelium (skin) and tiny hairs (cilia)
- contains glands in the cartilaginous portions that produce earwax (cerumen)
external canal 2 functions - CORRECT ANSWER - 1. to protect the delicate middle and
inner ear from foreign bodies that could damage these structures
, 2. along with contra, it boosts the amplitude of high frequency sounds.
The concha and the ____________ have a natural resonant frequency.
natural frequency - CORRECT ANSWER - is the frequency in which something responds
or vibrates best to
10 to 15 db - CORRECT ANSWER - - when frequencies enter the canal and are close to
or at the resonant frequency of the canal, they get an automatic boost of _____________.
- fricatives/ high frequencies get that boost.
- the boost enables us to localize
- this helps to create timing differences between the two ears which gives cues to where the
sounds are
middle ear - CORRECT ANSWER - - the external auditory meatus terminates
- the membrane acts as a boundary for this part of the ear....
tympanic membrane - CORRECT ANSWER - - the membrane acts as the anatommic
boundary between the outer and middle ear
- is comprised of mutiple layers of tissue: epithelial, medial membranous, fibrous
tympanic membrane layers - CORRECT ANSWER - - epithelial layer
- medial membranous layer
- fibrous layer (this layer is between top two)
medial layer of TM - CORRECT ANSWER - is contiguous with the membranous lining of
the middle ear cavity that is lined with mucous membrane
TM 2 sections - CORRECT ANSWER - - pars flaccida: which is located superiorly and as
the name suggests is flacid
- pars tensa - larger section, more stiff, located inferiorly
