CH. 13 - Hearing Aids

Question 1

device that moves in response to pressure waves of sound and converts acoustic signal to electric signal

Answer 1

Microphone

Question 2

device that boosts electrical signal of a microphone

Answer 2

amplifier

Question 3

device that converts electrical signal to acoustic signal

Answer 3

loudspeaker or receiver

Question 4

setup where microphone given to speaker, signal transmitted via signal to hearing aid

Answer 4

Remote-microphone system (RMS)

Question 5

with this type of sound input, a hearing aid picks up electromagnetic signals directly

Answer 5

t-coil

Question 6

what is this

Answer 6

t-coil neck loop

Question 7

this type of remote mic input device sends low-power, short-range signals between devices using magnetic-field energy, often between hearing aids

Answer 7

NFMI (near-field magnetic induction)

Question 8

what is this?

Answer 8

NFMI neck loop

Question 9

These two remote mic input sources are inside the hearing aid, so no intermediary receiver needed

Answer 9

DM and BT

Question 10

what does DM stand for RE sound input?

Answer 10

digitally modulated

Question 11

what does BT stand for RE sound input?

Answer 11

Bluetooth

Question 12

another name for a HA loudspeaker

Answer 12

receiver

Question 12

two main types of hearing aids

Answer 12

in-the-ear and behind-the-ear

Question 12

portion of ITE HA that faces outward

Answer 12

faceplate

Question 13

four types of ITE H.A.s

Answer 13

FS
HS
ITC
CIC

Question 14

RE hearing aids

what does FS stand for and what type of HA is it?

Answer 14

full-shell; ITE

Question 15

RE hearing aids

what does HS stand for and what type of HA is it?

Answer 15

half-shell; ITE

Question 16

RE hearing aids

what does ITC stand for and what type of HA is it?

Answer 16

in-the-canal; ITE

Question 17

RE hearing aids

what does CITC stand for and what type of HA is it?

Answer 17

completely-in-the-canal; ITE

Question 18

two subtypes of BTE hearing aids

Answer 18

standard/traditional; receiver-in-the-ear

Question 19

RE hearing aids

what does RITE stand for and what type of HA is it?

Answer 19

receiver-in-the-ear; BTE

Question 20

RE hearing aids

what does RIC stand for and what type of HA is it?

Answer 20

receiver-in-the-canal; BTE

Question 21

process of a speaker having limits on the amount of intensity it can deliver

Answer 21

Output limiting

Question 22

limit on how much gain can be added to input signal in a hearing aid

Answer 22

Maximum Power Output (MPO)

Question 23

when amplified sound from loudspeaker directed back into mic

Answer 23

feedback

Question 24

what is another term for an acoustic environment?

Answer 24

sound scene

Question 25

name for the loss of some hearing because plugging the ear

Answer 25

Plugging ears

Question 26

creating an opening in a hearing aid to lessen the effects of a plugged ear

Answer 26

venting

Question 27

what are these?

Answer 27

bone conduction hearing aids

Question 28

three main components of a hearing aid's machinery

Answer 28

-Mic/other input sources -Amplifier (gets power from battery) Loudspeaker/receiver

Question 29

directional HA usually have __ microphone(s)

Answer 29

2

Question 30

Five types of remote mics

Answer 30

1) DAI 2) Telecoil 3) NFMI 4) DM 5) BT

Question 31

what does DAI stand for?

Answer 31

direct audio input - type of remote mic input

Question 32

what does t-coil stand for?

Answer 32

tele-coil

Question 33

heart of the hearing aid

Answer 33

amplifier

Question 34

this type of hearing aid has all of the components inside the outer ear

Answer 34

ITE

Question 35

this type of hearing aid does not all of the components inside the outer ear

Answer 35

BTE

Question 36

what kind of BTE is this?

Answer 36

RIC

Question 37

what kind of BTE is this?

Answer 37

standard/conventional

Question 38

which type of HA is most often chosen for pediatrics

Answer 38

BTE

Question 39

a noncustom earplug that holds the receiver in a BTE

Answer 39

dome

Question 40

phenomenon when you're voice feels weird because your ears are plugged

Answer 40

occlusion effect

Question 41

HEARING AIDS The intensity of the incoming sound is called the __

Answer 41

input intensity

Question 42

HEARING AIDS The intensity of the sound produced from the HA is called the __

Answer 42

output intensity

Question 43

HEARING AIDS The amount that the sound is made louder by the HA is called the __

Answer 43

gain

Question 44

HEARING AIDS output - input =

Answer 44

gain

Question 45

HEARING AIDS input + gain =

Answer 45

output

Question 46

process of programming a HA so there are different amount of gain at different frequencies to match HL configuration

Answer 46

Frequency-Gain Response of HA

Question 47

HEARING AIDS Same amount of gain applied to input signal regardless of original intensity

Answer 47

linear amplification

Question 48

HEARING AIDS Amount of gain HA gives depends on incoming intensity

Answer 48

nonlinear amplification

Question 49

HEARING AIDS linear amplification is better for ___ HL

Answer 49

conductive

Question 50

HEARING AIDS nonlinear amplification is better for ___ HL

Answer 50

sensorineural

Question 51

HEARING AIDS These are used to program hearing aids, and take into account freq's at different ranges, gains as function of input, and capping intensity

Answer 51

prescriptive algorithms

Question 52

one easy way to reduce feedback in HA

Answer 52

put mic and loudspeaker father apart

Question 53

two ways modern hearing aids can compensate for background noise

Answer 53

1) directionality 2) noise reduction

Question 54

these types of HA typically last longer

Answer 54

BTE