Exam 1 Part 4

Question 1

What is the purpose of listening devices for clients?

Answer 1

Provide sound access across speech range, present speech clearly, create a dynamic range of hearing, enhance personal safety and environmental awareness

Question 2

Taking the incoming signal and making it more clear

Answer 2

Signal-processing

Question 3

Audiologist sets electroacoustic properties; settings for different listening situations

Answer 3

Programmability

Question 4

Aims to amplify speech range not noise

Answer 4

Digital noise reduction

Question 5

Component of a hearing aid that picks up acoustic signal from environment and converts from acoustic to electric signal; designed to deliver signal without distortion or additional noise

Answer 5

Microphone

Question 6

Type of microphone that picks up sound in front of the user, improves signal-to-noise ratio, and ideal for listening in noise (Example: Listening to someone in a noisy restaurant)

Answer 6

Directional microphone

Question 7

Type of microphone that picks up sound in all directions; used in quiet listening situations

Answer 7

Omni-directional microphone

Question 8

What type of hearing aid microphone is typically used for children?

Answer 8

Omni-directional

Question 9

Type of microphone that changes from omni-directional to directional change

Answer 9

Automatic directional

Question 10

What are the components of a hearing aid?

Answer 10

Microphone, amplifier, receiver, earmolds

Question 11

Component of the hearing aid that increases the level of signal

Answer 11

Amplifier

Question 12

Amount of amplification provided by amplifier

Answer 12

Gain/acoustic gain

Question 13

How do you find acoustic gain?

Answer 13

Output minus input

Question 14

Increases signal received from microphone

Answer 14

Preamplifier

Question 15

Improves quality of signal

Answer 15

Signal processing

Question 16

Amplifies processed signal and sends to receiver

Answer 16

Output

Question 17

Prevents the signal from becoming too loud

Answer 17

Output limiting of hearing aid

Question 18

Point where amplifier no longer provides and increase in output

Answer 18

Saturation level

Question 19

Not amplifying anything that is over the patient’s maximum output; causes distortion and loss of sound quality; clips peaks off the waveform

Answer 19

Peak-clipping

Question 20

Helps to avoid distortion; provides sound access within patient’s dynamic range; provides varying amount of gain of speech signal

Answer 20

Compression