Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

AUDE 5450 AMP 1 > Practical > Flashcards

Practical Flashcards

1
Q

what are the goals of earmold impression

A

go 2mm beyond bend
stretch aperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what should you do first for earmold impressions

A

wash hands

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is important before starting impressions

A

case history

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what should you ask for case hx

A

have they had surgery on their ears? if so what?

are they taking any blood thinners?

are they diabetic or immunocompromised?

do they have any allergies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

should you stand for otoscopy

A

no sit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

foam block

A

slightly larger than EAC entrance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

cotton block

A

same size as EAC entrance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are you looking for on otoscopy after inserting the otoblock

A

Ensure block is tight in canal with no gaps - foam blocks should be compressed
Ensure removal string is in the center of the block not at an angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what are otoblock precautions

A

Perf
Ensure NO GAPS present bw canal wall and block
PE Tube
Aggressive block depth may cause pain/damage
Mastoidectomy/Widening Canal
Might require more than one block to fill canal
If insertion beyond the isthmus suddenly becomes easier it is a clear sign of a widening canal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

can you use gloves to mix earmold material

A

no

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

how to do a single open jaw impression

A

place in mouth horizontally on side of impression

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how do you do a bilateral open jaw impression

A

place vertically in center of mouth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

why do we do open jaw impressions

A

Increase size of aperture for a snugger fit - condyle of mandible moves forward and pulls the anterior canal wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what are you looking for on earmold impression after removal

A

Are concentric circles present?
Is the valley filled?
Is the Concha cymba filled?
Is the Concha cavum filled?
Does material reach the otoblock?
*Does the canal length meet requirement/ patient’s needs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

for earmold modifications what is the blue stone for

A

Course
Used to modify silicone
Need to use at least 25k to 20k RPM for best results

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is the white stone for for eaermold modifications

A

For grinding acrylic or vinyl
Smaller one is for smaller areas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

low grit

A

removes a lot fast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

medium grit

A

less material & smoother finish

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

fine grit

A

smooths & restores shine
only used w/ lucite/acrylic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Factors to Consider When Selecting a HA Style

A

Fitting range- can the style supply sufficient output?
Pinna effect- will the microphone placement enhance or reduce spectral cues?
Likelihood that the style will cause feedback or occlusion?
Wind noise-will the wind to produce turbulence inside the microphone?
Will the size of the patient’s ear canal limit the output or size of controls?
Will perspiration, cerumen, and humidity impact device function?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Realistic fitting ranges are impacted by

A

Proximity of microphone to receiver
smaller devices produce less output
Size of receiver
larger receivers produce greater output
Physical properties of sound bore (length, diameter)
Vent size
Microphone location
Proximity to tympanic membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Near normal low frequency hearing typically doesn’t require an amplified signal because the intensity of a “direct signal” is audible without amplification

A

true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what vent size should match 50-60 dB loss @ 500 Hz

A

.5 to no

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what vent size should match 40-49 dB loss @ 500 Hz

A

1-2mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

what vent size should match 30-39 dB loss @ 500 Hz

A

2-3mm or power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what vent size should match 20-29 dB loss @ 500 Hz

A

3-3.5 mm or closed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what vent size should match </= 20 dB loss to 1.5 kHz

A

open dome

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

what is the OE

A

Increased perception of ones own voice when there is something blocking the ear canal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

what causes the OE

A

Dome closing off the ear
Mold with a vent that isn’t large enough

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

what is feedback

A

too much amplified sound that leaks back out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

what causes feedback

A

Too large of a vent = sound escaping and recycles back into the microphone
Creates a cycle/loop
Makes a squealing sound
Need tighter earmold or vent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

As receiver gets closer to the mic -

A

less output = smaller devices because it drives feedback

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

what is the pinna affect

A

Pinna adds natural gain & spatial awareness cues & decreases wind noise
Effets boosts of HF signals by ~7 dB SPL
The deeper the microphone is in the ear canal the greater the effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

what type of HA gives the pinna effect

A

CIC/IIC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Combination of deep mic placement & deep fit device increase output by

A

~13 dB SPL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

When volume b/w ™ & receiver reduces the output increases by

A

~6 dB SPL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

what increases the devices output

A

sound bore proximity to the TM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

what does an IP68 mean

A

IP68
Dust light
Protects against long periods of liquid immersion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

-10 to 15 dB

A

nornal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

15-25

A

slight hl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

25-40

A

mild hl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

40-55

A

moderate hl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

50-70

A

mod severe hl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

70-90

A

severe hl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

> 90

A

profound hl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

what degree of hearing does BTE fit

A

all
-10 to profound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

what degree of hearing does slim tube fit

A

mild to mod hl
-10 to 55

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

what degree of hearing does ric fit

A

min to severe hl
-10 to 90

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

what degree of hearing does ITE full shell fit

A

normal LF to mod sev hl
-10 to 70

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

what degree of hearing does ITC fit

A

slight lf to mod sev hl
20-70

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

what degree of hearing does CIC fit

A

mild to mod sev hl
25-70

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

what degree of hearing does IIC fit

A

mild to mod severe
30-70

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

what is a cros HA

A

Contralateral routing of sound
Single sided deafness - one ear is normal and poorer ear is unaidable
One good ear and one bad

54
Q

what is bicros

A

Bilateral contralateral routing of sound
Bilateral asymmetric HL - one ear has threshold loss & poorer ear is unaidable
Both ears are bad, asymmetry HL

55
Q

for bicros or cros when the PT wears the devices will they get binaural hearing?

A

No because they still only have one ear and will not have spatial awareness

56
Q

what is ampcros

A

For asymmetric HL
bad and better ear
bad ear is not good for hearing aids (poor discrimination etc.) but not unaidable
fits two HA’s on the PT’s ear but in the two is a transmitter so you amplify both ears but then also routing the poor ear over to the other ear for extra boost of understanding
when you fit HA’s to both ears but they also transmit a signal to the opposite ear

57
Q

what loss is full shell for

A

challenging to insert
max retention
severe/profound - 70-90
high gain aids

58
Q

skeleton mold

A

popular
easy to insert & discrete
max retention
mild to severe - 25-90

59
Q

canal mold

A

easy insertion
cosmetically nice
retention needs 2mm beyond 2nd bend
mild to sev - 25-90

60
Q

canal lock

A

easy insertion
cosmetics w/ retention
mild to severe - 25-90

61
Q

half shell

A

easy insertion
easy retention
mild to severe - 25-90

62
Q

all shells are mild to severe fitting except

A

full shell
fits to profound

63
Q

when can an open dome be used

A

normal hearing to 1500 w/ HF loss

64
Q

when can a closed/tulip coupler be used

A

thresholds </= 40 dB below 1000

65
Q

when can a power dome be used

A

thresholds </= 40 dB below 1000

66
Q

If HL 50dB or more in low frequencies you have to have

A

mold

67
Q

what is an alternative to stock open dome couplers

A

custom open mold

68
Q

who is vinyl good for

A

infants
those w/ dexterity issues
high gain devices

69
Q

who is silicone good for

A

peds
high gain devices
allergiesw

70
Q

who is lucite good for

A

adults
mild-severe loss
soft pinnas

71
Q

advantages of vinyl

A

snug fit needed for high gain devices
cemented tube needs less canal space
easily modified

72
Q

disadvantages of vinyl

A

shrinks
hardens
discolors
replace every 6-12 mos

73
Q

advantages of silicone

A

durable
doesn’t shrink
hypoallergenic
snug fit for high gain

74
Q

disadvantages for silicone

A

sticky material can cause discomfort
hard to modify
cannot glue tubing
more expensive

75
Q

adv of acrylic

A

durable
no shrinking
easy insertion & removal

76
Q

disadv of acrylic

A

cannot move w/ ear canal turns & narrowing
increased feedback w/ movement
physical injury if hit

77
Q

common use of acrylic

A

adults
floppy soft pinnas

78
Q

common use for vinyl

A

pediatric
firm ear texture

79
Q

common use for silicone

A

high gain aids
allergies
facial flex issues

80
Q

A change to the internal diameter will change the device output and frequency response

A

true

81
Q

what is the diff bw 12 & 13 inner diameter?

A

12 is thicker and bigger opening
13 has a smaller opening

82
Q

smaller diameter of inner tube =

A

more attenuation there is in high frequency signals

83
Q

what is a tube lock

A

Used w/ silicone
Grommet used to increase friction fit into the mold

84
Q

waht is a libby horn

A

gives a boost in the high frequencies

85
Q

what is a continuous flow adapter

A

Small canals that can’t fit standard tube size
Keeps internal diameter of sound bore bw BTE & earmold to provide a continuous inner diameter & unimpeded flow of amplified signal

86
Q

what is dry tubing and why is it used

A

Reduces moisture buildup problems in tubing in humid environments or those who perspire a lot

87
Q

thin/heavy cement

A

lucite acrylic

88
Q

uses vinyl cement

A

vinyl

89
Q

walk through silicone retubing

A

Cut the tube where it enters the earmold as close as possible
Take the screwdriver tool and push the tubing out of the mold
Push the threader through the sound bore side
Feed the new tube through the needle with the quail side up & pull through the sound bore side
Make sure the new tubing has the grommet
Pull until the grommet meets the wall of the mold. DO NOT PULL FULLY THROUGH
Use tool to push and lock it in the sound bore correctly
Use the depth line on the tool for reference and push grommet in until it reaches that line
Cut the tube at the sound bore as close to the mold as possible without cutting the mold
Use the exacto knife

90
Q

walk through retubbing of vinyl & acrylic

A

Take pliers and try to pull the tube out in one try
Use the reemer to push through the sound bore to make sure all pieces are out
Size the tubing
Once you find the right tube size, find the right cement
Lucite/Acrylic uses thin cement
Vinyl uses vinyl cement
Use a pipe cleaner and dip into the correct cementTake the needle threader and push through the sound bore side. Then take the quail side of the tube through the threader and pull through
Make sure the tubing is facing the correct angle
Drop a little cement as a final seal on the outside on the base side
Use the exacto knife to cut the sound bore tubing without cutting the mold. Check it doesn’t snag

91
Q

Measurement mic that is sealed into the coupler and collects output data from the HA

A

coupler mic

92
Q

Simulates ITE & ITC products

A

ha 1 coupler

93
Q

BTE w/ hooks

A

ha 2 coupler

94
Q

what is the OSPL 90- Output SPL @ 90 dB measured during ansi

A

This shows output for a 90dB SPL input signal (MPO)
Loudest possible output point device can produce for a 90 dB input signal & represents a single frequency

95
Q

what is HFA OSPL 90- HF Avg output SPL @ 90dB measured in ansi

A

Calculates the average OSPL 90 output for 1, 1.6 and 2.5 kHz
*3 triangles at the bottom

96
Q

what is HFA FOG - HF avg full-on gain measured on ansi

A

Shows avg gain for 1, 1.6, 2.5 for a 50 dB signal
Estimates the max gain available at different frequencies when an avg input signal is amplified

97
Q

what is equivalent input noise (EIN)

A

Measures the internal noise of the HA
Noise coming from mic, amplifiers, DSP circuit, receiver etc.
Typically 25- 30 dB SPL is acceptable

98
Q

what is total harmonic distortion

A

Measures signal distortion
Determines if output signal contains harmonic frequencies that were not present in the input signal

99
Q

what is % total harmonic distortion

A

Should be below 5-10%
High DL are indicators the device is close to failing (most likely the receiver) & needs sent in for a repair

100
Q

step one: look at manufacturer value on spec sheet
step two: look at summary of tolerances
step 3: look at data point; is it in or out of spec

A

true

101
Q

what are the steps for looking at specs

A

step one: look at manufacturer value on spec sheet
step two: look at summary of tolerances
step 3: look at data point; is it in or out of spec

102
Q

what is directional mic front to back ratio (FBR)

A

Compares output of an input signal coming from 0-deg azimuth to the input signal coming from 180-deg azimuth

103
Q

what does directional mic test show

A

Heavy line - front mic output
Light line - back output at the null

104
Q

what is digital noise reduction attenuation ansi

A

it acts on steady signals (fast modulation rates and low modulation depths)
Kicks in for signals that are louder than the first TK
Because it looks at the timing elements of the noise (fast mod rate & low mod depths)

105
Q

what is SPLITS

A

shows output of tcoil in horizontal

106
Q

what is RSETS

A

difference bw the mic and the tcoil output in horizontal

107
Q

which measures telephone tcoil

A

horizontal magnetic field
SPLITS & RSETS

108
Q

which measures looped t coil

A

vertical magnetic field
SPLIV & RTLS

109
Q

SPLIV

A

output of tcoil (in vertical)

110
Q

RTLS

A

difference bw mic and tcoil in verticle

111
Q

horizontal t coil is best for

A

telephone

112
Q

vertical t coil is best for

A

loop environment

113
Q

what is the point in the TMFS test

A

This verifies output from the two transducers is the same & identifies which position the telecoils sensitivity is greatest

114
Q

what is a +RSET

A

telecoil output it louder than the mic output
PT will turn HA down when telecoil is on

115
Q

what is a - RSETS

A

telecoil ouput is softer than the mic output
PT will turn HA up when telecoil is on

116
Q

T indicates mic is off & output is only from tcoil

A

open dome device

117
Q

mT indicates tcoil & mic output is combined but mic output is softer

A

severe thresholds

118
Q

MT indicates devices combines tcoil & mic output

A

equally

119
Q

what is the largest battery size

A

675 (blue

120
Q

what is the smallest ha size

A

10 (yellow)

121
Q

what is the most comon size battery

A

312 brown

122
Q

what is the purpose of a listening chekc

A

subjective eval of HA, will only pick up significant device malfunction, should perform electroacoustic measure to compare to manufacturer specifications
Listening for unusual distorted bad sounds
Is it linear or nonlinear
Is it directional or omn

123
Q

what are the ling sounds

A

“ah”, “ee”, “oo”, “sh”, “ss”, “mm

124
Q

why are ling sounds used

A

tests across the frequency range

125
Q

what is linear on a ha

A

If there is no change in amplitude from soft to loud

126
Q

what is nonlinear in a ha

A

Amplitude is louder for soft and softer for loud

127
Q

how do you know its a directional mic

A

If you turn HA 360 deg and sound attenuates behind HA

128
Q

how do you know its an omnidirectional mic

A

If you turn HA 360 deg and it doesn’t attenuate from behind

129
Q

what is expansion used for

A

to lower the output of very soft sounds
CR <.9:1

130
Q

what is WDRC used for

A

needed to get soft sounds louder & expand dynamic range

restores loudness perception

More sound added to soft signals for audibility, less to moderate signals and minimal to intense sounds so they are perceived as loud without causing discomfort

CR 1.1:1 TO 4:1

131
Q

when is output limiting compression used

A

-need this to protect the ear from loud sounds

CR >/= 5:1

AUDE 5450 AMP 1 (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions