Chpt 3: Hearing Aids/alds

Front 1

What are the basic components of a hearing aid?

Back 1

Microphone, Amplifier, Receiver and Battery

Front 2

Probe-Microphone Measures

Back 2

Measures the gain and output of a hearing aid. Helps to make sure patient is hearing at the level the audiologist expects.

Front 3

What does a microphone do?

Back 3

Picks up environmental sounds and turns the sound waves into an electrical signal.

Front 4

What does and amplifier do?

Back 4

Boosts the Hz collected from the microphone.

Front 5

Whate does a receiver do?

Back 5

Converts the amplified signal back into a sound wave.

Front 6

What is a telecoil?

Back 6

A programable feature that allows hearing aid to directly communicate with the telephone, it cuts the microphone off from outside noise.

Front 7

Describe the control of frequency-specific gain.

Back 7

An internal control that allows audiologist to choose the number of channels. Can select smaller amounts of pitch to get clearer sound, can select to pick up sounds at the whisper level.

Front 8

Describe the compression feature of a hearing aid.

Back 8

Programable feature that controls the level of sounds. EX: compresses the sound level of a siren.

Front 9

Describe the directional microphone technology feature of a hearing aid.

Back 9

Most important feature for background noise: Gives pt. the option of hearing background noise depending on how busy their environments are. Uses multiple microphones.

Front 10

What are the 6 styles of hearing aids?

Back 10

1. Body aid
2. Eyeglass aid
3. Behind-the-ear
4. In-the-ear
5. In-the-canal
6. Completely-in-the-canal

Front 11

Back 11

Completely-in-the-canal
- smallest, pull on wire to get out

Front 12

Back 12

In-the-canal
- a little larger than CITs.

Front 13

Back 13

In-the-ear
- full shell vs. half shell (either covers full/half of concha bowl)

Front 14

Back 14

Behind-the-ear:
- leaves ear relatively open to prevent barrel effect.
- doesn't boost lower freq., more naturally heard.
-higher freq. are more boosted
-durable, can fix indiv. parts and adjust ear mold for growth
-easy to clean

Front 15

How often to you have to refit babies?

Back 15

As newborns every 2 weeks. From 8mos to 6 yres every 6 months.

Front 16

How would you specially fit someone who had one dead ear and one ear with hearing loss?

Back 16

Bi-cross aid: A microphone is worn on the unaidable ear and entering sound is routed by FM transmitters to a microphone, amplifier and receiver worn on the better ear, which also acts as a hearing aid.

Front 17

How would you specially fit someone who had one dead ear and one good ear?

Back 17

Cross aid: A microphone is worn on the impaired ear and entering sound is routed by FM transmitters to an amplifier and receiver worn on the better ear.

Front 18

How would you specially fit someone who had outer ear (air conduction) issues?

Back 18

Bone conduction aids - rod goes into mastoid to send signals through bone conduction.

Front 19

What is a middle ear implant?

Back 19

It hooks on to stapes footplate and amplifies sound. Huge liability issue, mostly done for cosmetic reasons.

Front 20

What type of hearing loss would qualify for a cochlear implant?

Back 20

severe to profound hearing loss

Front 21

What are the 3 modifications of earmolds?

Back 21

1. Lower frequency modifications
2. Mid-frequency modifications
3. High-frequency modifications

Front 22

What does a low-frequency modification do?

Back 22

Venting, prevents echo effect that causes patient to feel like they are in a barrel.

Front 23

What does a mid-frequency modification do?

Back 23

Dampening, filters are placed in ear hook to reduce the output and intake of the hearing aid.

Front 24

What does a high-frequency modification do?

Back 24

Acoustic horn is used to emphasize the high frequencies.

Front 25

What are the 5 sizes of hearing aid batteries?

Back 25

675
13
312
10
5

Front 26

T/F: The smaller the battery the quicker it goes dead.

Back 26

True

Front 27

Why would we use Output Sound Pressure Level (OSPL 90) to test Hearing aids?

Back 27

To test for loud sounds because over exposure to loud dB causes hearing loss at certain durancies.

Front 28

Why would we test High Frequency Average (HFA)? OSPL 90

Back 28

Allows one to see the maximum output the HA can generate. Want to be sure HA doesn't exceed the patients loudness discomfort level.

Front 29

Why would we test HFA FOG (full on gain)?

Back 29

Allows us to estimate the maximum power of the hearing aid. HA are adjusted to deliver the greatest amount of gain for those frequencies which a person has the poorest thersholds.

Front 30

Why would we test HFA RTG (reference-test gain)?

Back 30

Test how aid performs at a level closer to typical speech.

Front 31

Why would we test Frequency Range?

Back 31

So we know what the lowest frequency and highest frequencys that the hearing aid can pick up.

Front 32

Why would we test Total Harmonic Distortion? (THD)

Back 32

Unwanted signals created by a hearing aid.

Front 33

Why would we test for Equivalent Input Noise (EIN)?

Back 33

The Equivalent Input Noise is the amount of noise which is present in the hearing aid without any input present.

Front 34

Describe HIOBASIC orientation.

Back 34

H- hearing expectations
I- instrument options
O- occlusion effect
B- batteries
A- acoustic feedback
S- system troubleshooting
I- insertion/removal
C - cleaning/maintenance

Front 35

HIOBASIC
H

Back 35

Hearing Expectations - Review expectations and limitations of hearing aid.

Front 36

HIOBASIC
I

Back 36

Instrument Options- Describes the function of each part and ensurest that the pt. can adjust controls.

Front 37

HIOBASIC
O

Back 37

Occlusion Effect -

Front 38

HIOBASIC
B

Back 38

Batteries - Patient practices inserting and removing batteries

Front 39

HIOBASIC
A

Back 39

Acoustic Feedback - Used to determine how good the HA is working.

Front 40

HIOBASIC
S

Back 40

System troubleshooting - patient learns to troublshoot device for common problems such as weak or no sound and feedback.

Front 41

HIOBASIC
I (2nd)

Back 41

Insertion/ Removal - patient learns to get in and out. 2nd biggest complaint, patient can't remove HA.

Front 42

HIOBASIC
C

Back 42

Patient learns how to clean earwax from HA and how to properly maintain it by keeping it away from moisture.

Front 43

Hardwire Systems

Back 43

pocket talker, box w/ amplifier and receiver and headphones.

Front 44

Induction Loop Systems

Back 44

infrared systems looped into areas (theatres, churches, etc.)

Front 45

FM Systems

Back 45

Typicall wireless; consists of microphone and or headphones. Cuts down distance between speaker and listener.

Front 46

Television

Back 46

TV ears, wireless headphones

Front 47

Alerting Signals or devices

Back 47

Allows hearing impaired to be aware of alarms, doorbells and phones through the use of strobe lights/ vibrations.