Hearing Aid Dispenser Written Exam |\ |\ |\ |\ |\
questions with answers |\ |\
db loss of a perforation of TM - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔10-15db loss |\
procedure done to fix perforation - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔tympanoplasty or myringoplasty |\ |\
monomeric spots - CORRECT ANSWERS ✔✔looks like a|\ |\ |\ |\ |\ |\ |\ |\
hole in TM, but reflects light like a mirror. holes that have
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
healed. aka "mirror membranes"
|\ |\ |\
average dimentions of an adult eardrum - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔2.3-2.9cm in length, .7cm in diameters
|\ |\ |\ |\ |\ |\
pars tensa - CORRECT ANSWERS ✔✔lower 4/5 of TM and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
tight
pars flaccida - CORRECT ANSWERS ✔✔upper 1/5 of TM
|\ |\ |\ |\ |\ |\ |\ |\ |\
and flaccid
|\
,otis externa - CORRECT ANSWERS ✔✔"swimmers ear" -
|\ |\ |\ |\ |\ |\ |\ |\
inflammation of the walls of the EAM. will not cause loss |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
unless swelling blocks canal. treat: warm salt water,
|\ |\ |\ |\ |\ |\ |\ |\
drying it, topical antibiotics
|\ |\ |\
polyps - CORRECT ANSWERS ✔✔masses of tissue that
|\ |\ |\ |\ |\ |\ |\ |\
grow outward from a surface
|\ |\ |\ |\
cholesteatoma - CORRECT ANSWERS ✔✔non-cancerous |\ |\ |\ |\ |\
tumor in the middle ear. oderous discharge. sometimes
|\ |\ |\ |\ |\ |\ |\ |\
perforates upper TM. invasions of skin into the middle ear |\ |\ |\ |\ |\ |\ |\ |\ |\
- sac of concentric rings of protein. causes conductive
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
loss. most dangerous pathology.
|\ |\ |\
enlarged canal - CORRECT ANSWERS ✔✔result of ear
|\ |\ |\ |\ |\ |\ |\ |\
surgery. often have no ear drum or ossicular chain. need
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
approval of physician before fitting |\ |\ |\ |\
tympanosclerosis - CORRECT ANSWERS ✔✔white, chalky |\ |\ |\ |\ |\ |\
calcium deposits caused by degeneration of tissue on
|\ |\ |\ |\ |\ |\ |\ |\
eardrum, thicking and scarring from peforations and
|\ |\ |\ |\ |\ |\ |\
infections
epitympanic cavity - CORRECT ANSWERS ✔✔attic of |\ |\ |\ |\ |\ |\ |\
middle ear. allows air into mastoid cells of temporal bone.
|\ |\ |\ |\ |\ |\ |\ |\ |\
branches several nerves
|\ |\ |\
,incudotapedial junction - CORRECT ANSWERS ✔✔top of |\ |\ |\ |\ |\ |\ |\
incus to head of stapes
|\ |\ |\ |\
annular ligament - CORRECT ANSWERS ✔✔footplate of
|\ |\ |\ |\ |\ |\ |\
stapes that is held in the oval window
|\ |\ |\ |\ |\ |\ |\
speed of sound - CORRECT ANSWERS ✔✔700mph or 340
|\ |\ |\ |\ |\ |\ |\ |\ |\
m/s (4x as fast through water, 14x as fast through steel)
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reflection - CORRECT ANSWERS ✔✔is an echo or a
|\ |\ |\ |\ |\ |\ |\ |\ |\
reverberation
reverberation - CORRECT ANSWERS ✔✔often in a small |\ |\ |\ |\ |\ |\ |\ |\
room, 17m or less, reverbs can mask high frequencies
|\ |\ |\ |\ |\ |\ |\ |\
echo - CORRECT ANSWERS ✔✔heard and perceived later
|\ |\ |\ |\ |\ |\ |\ |\
than original sound (more than 1/10s after)
|\ |\ |\ |\ |\ |\
absorption - CORRECT ANSWERS ✔✔aborbs sound. can
|\ |\ |\ |\ |\ |\ |\
improve environments w/ reflection or reverb. better in
|\ |\ |\ |\ |\ |\ |\ |\
warmth and moist |\ |\
, diffraction - CORRECT ANSWERS ✔✔sharpness in the |\ |\ |\ |\ |\ |\ |\
change in direction of sound, bending. high
|\ |\ |\ |\ |\ |\ |\
diffraction=bigger wavelengths (low freq) |\ |\ |\
refraction - CORRECT ANSWERS ✔✔sound passes through
|\ |\ |\ |\ |\ |\
one medium to another, change in speed and wavelength
|\ |\ |\ |\ |\ |\ |\ |\ |\
infrasound - CORRECT ANSWERS ✔✔below audible range |\ |\ |\ |\ |\ |\ |\
of 20 Hz
|\ |\
ultrasound - CORRECT ANSWERS ✔✔above audible range |\ |\ |\ |\ |\ |\ |\
of 20K Hz
|\ |\
octave - CORRECT ANSWERS ✔✔anytime the frequency
|\ |\ |\ |\ |\ |\ |\
doubles. f(2) = on octave; f(3)= two octaves
|\ |\ |\ |\ |\ |\ |\
faintest sound a human can hear - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔10 ^ -16 watts/cm^2 and pressure of .0002
|\ |\ |\ |\ |\ |\ |\
dynes/cm^2
|\
threshold of pain - CORRECT ANSWERS ✔✔1000 |\ |\ |\ |\ |\ |\
dynes/cm^2
|\
when SPL levels double how many db levels increase? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔6 db |\ |\ |\
questions with answers |\ |\
db loss of a perforation of TM - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔10-15db loss |\
procedure done to fix perforation - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔tympanoplasty or myringoplasty |\ |\
monomeric spots - CORRECT ANSWERS ✔✔looks like a|\ |\ |\ |\ |\ |\ |\ |\
hole in TM, but reflects light like a mirror. holes that have
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
healed. aka "mirror membranes"
|\ |\ |\
average dimentions of an adult eardrum - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔2.3-2.9cm in length, .7cm in diameters
|\ |\ |\ |\ |\ |\
pars tensa - CORRECT ANSWERS ✔✔lower 4/5 of TM and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
tight
pars flaccida - CORRECT ANSWERS ✔✔upper 1/5 of TM
|\ |\ |\ |\ |\ |\ |\ |\ |\
and flaccid
|\
,otis externa - CORRECT ANSWERS ✔✔"swimmers ear" -
|\ |\ |\ |\ |\ |\ |\ |\
inflammation of the walls of the EAM. will not cause loss |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
unless swelling blocks canal. treat: warm salt water,
|\ |\ |\ |\ |\ |\ |\ |\
drying it, topical antibiotics
|\ |\ |\
polyps - CORRECT ANSWERS ✔✔masses of tissue that
|\ |\ |\ |\ |\ |\ |\ |\
grow outward from a surface
|\ |\ |\ |\
cholesteatoma - CORRECT ANSWERS ✔✔non-cancerous |\ |\ |\ |\ |\
tumor in the middle ear. oderous discharge. sometimes
|\ |\ |\ |\ |\ |\ |\ |\
perforates upper TM. invasions of skin into the middle ear |\ |\ |\ |\ |\ |\ |\ |\ |\
- sac of concentric rings of protein. causes conductive
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
loss. most dangerous pathology.
|\ |\ |\
enlarged canal - CORRECT ANSWERS ✔✔result of ear
|\ |\ |\ |\ |\ |\ |\ |\
surgery. often have no ear drum or ossicular chain. need
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
approval of physician before fitting |\ |\ |\ |\
tympanosclerosis - CORRECT ANSWERS ✔✔white, chalky |\ |\ |\ |\ |\ |\
calcium deposits caused by degeneration of tissue on
|\ |\ |\ |\ |\ |\ |\ |\
eardrum, thicking and scarring from peforations and
|\ |\ |\ |\ |\ |\ |\
infections
epitympanic cavity - CORRECT ANSWERS ✔✔attic of |\ |\ |\ |\ |\ |\ |\
middle ear. allows air into mastoid cells of temporal bone.
|\ |\ |\ |\ |\ |\ |\ |\ |\
branches several nerves
|\ |\ |\
,incudotapedial junction - CORRECT ANSWERS ✔✔top of |\ |\ |\ |\ |\ |\ |\
incus to head of stapes
|\ |\ |\ |\
annular ligament - CORRECT ANSWERS ✔✔footplate of
|\ |\ |\ |\ |\ |\ |\
stapes that is held in the oval window
|\ |\ |\ |\ |\ |\ |\
speed of sound - CORRECT ANSWERS ✔✔700mph or 340
|\ |\ |\ |\ |\ |\ |\ |\ |\
m/s (4x as fast through water, 14x as fast through steel)
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reflection - CORRECT ANSWERS ✔✔is an echo or a
|\ |\ |\ |\ |\ |\ |\ |\ |\
reverberation
reverberation - CORRECT ANSWERS ✔✔often in a small |\ |\ |\ |\ |\ |\ |\ |\
room, 17m or less, reverbs can mask high frequencies
|\ |\ |\ |\ |\ |\ |\ |\
echo - CORRECT ANSWERS ✔✔heard and perceived later
|\ |\ |\ |\ |\ |\ |\ |\
than original sound (more than 1/10s after)
|\ |\ |\ |\ |\ |\
absorption - CORRECT ANSWERS ✔✔aborbs sound. can
|\ |\ |\ |\ |\ |\ |\
improve environments w/ reflection or reverb. better in
|\ |\ |\ |\ |\ |\ |\ |\
warmth and moist |\ |\
, diffraction - CORRECT ANSWERS ✔✔sharpness in the |\ |\ |\ |\ |\ |\ |\
change in direction of sound, bending. high
|\ |\ |\ |\ |\ |\ |\
diffraction=bigger wavelengths (low freq) |\ |\ |\
refraction - CORRECT ANSWERS ✔✔sound passes through
|\ |\ |\ |\ |\ |\
one medium to another, change in speed and wavelength
|\ |\ |\ |\ |\ |\ |\ |\ |\
infrasound - CORRECT ANSWERS ✔✔below audible range |\ |\ |\ |\ |\ |\ |\
of 20 Hz
|\ |\
ultrasound - CORRECT ANSWERS ✔✔above audible range |\ |\ |\ |\ |\ |\ |\
of 20K Hz
|\ |\
octave - CORRECT ANSWERS ✔✔anytime the frequency
|\ |\ |\ |\ |\ |\ |\
doubles. f(2) = on octave; f(3)= two octaves
|\ |\ |\ |\ |\ |\ |\
faintest sound a human can hear - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔10 ^ -16 watts/cm^2 and pressure of .0002
|\ |\ |\ |\ |\ |\ |\
dynes/cm^2
|\
threshold of pain - CORRECT ANSWERS ✔✔1000 |\ |\ |\ |\ |\ |\
dynes/cm^2
|\
when SPL levels double how many db levels increase? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔6 db |\ |\ |\
