Pure Tone Audiometry

Question 1

Measurement of the range and sensitivity of a person’s sense of hearing

Answer 1

Audiometry

Question 2

Two distinct transmission pathways to measure hearing thresholds

Answer 2

Air conduction

Bone conduction

Question 3

Tones are transmitted through the bones of the skull to the cochlea

Answer 3

Bone conduction

Question 4

Tones are transmitted through the air from a transducer into the ear canal

Answer 4

Air conduction

Question 5

Transmission pathway that bypasses the middle and outer ear and directly stimulates the cochlea

Answer 5

Bone conduction

Question 6

Transmission pathway that passes through the middle and outer ear and ends up at the cochlea

Answer 6

Air conduction

Question 7

Objectives of Pure tone audiometry

Answer 7

1. Quantify the listener’s hearing level

2. Determine his/her ability to perceive sound and understand speech

Question 8

Results of Pure tone audiometry is used to:

Answer 8

1. Identify a disorder/disease
2. Aid in habilitation/rehabilitation (amplification with a hearing aid, educational and counseling programs, speech and language services)

Question 9

Procedure where hearing sensitivity is measured for tones over the frequency range of speech

Answer 9

Pure Tone Audiometry

Question 10

What is the frequency range of speech?

Answer 10

250-8000 Hz

Question 11

What frequencies do we test for air conduction?

Answer 11

250, 500, 1000, 2000, 3000, 4000, 8000 Hz

Question 12

The index of hearing sensitivity is the _______ of hearing

Answer 12

threshold

Question 13

PTA requires a _____ response only

Answer 13

Detection

Question 14

What do thresholds not tell us about?

Answer 14

Doesn’t tell us much about the quality of the signal that the listener heard
Doesn’t tell us about the listener’s ability to understand speech at higher suprathreshold levels

Question 15

The level at which a stimulus is barely perceptible (the subject is aware of the sound at least 50% of the times it is presented)

Answer 15

Threshold

Question 16

Equipment for Air-Conduction (3)

Answer 16

Sound Isolated Room
Audiometer
Transducer

Question 17

What are the types of audiometers: (3)

Answer 17

Screening vs. Diagnostic
Pure tone vs. Speech
Manual vs. Automatic

Question 18

What does an audiometer control for?

Answer 18

the level of the stimulus
duration of the stimulus
frequency of the stimulus
type of stimulus (noise, speech, pure tones)
ear under test
masking noise

Question 19

an electronic device used for presenting controlled acoustic signals to a listener to test some aspect of auditory function

Answer 19

Audiometer

Question 20

Supra-aural earphones and insert earphones are __________.

Answer 20

transducers

Question 21

Advantages of insert earphones

Answer 21

comfortable
prevents ear canal from collapsing under the weight of the TDH earphones
better attenuation of ambient noise
increased interaural attenuation

Question 22

Disadvantages of insert earphones

Answer 22

can’t be reused, which increases the cost of testing

Question 23

What is the purpose of pure-tone screening audiometry?

Answer 23

Used to evaluate a large number of people in a short period of time
To separate people into two groups: those at risk and those not at risk

Question 24

ASHA Hearing Screening Guidelines

Answer 24

Developed for screening children approximately three years of age to third grade and for high-risk children in other grades
The same guidelines can be used in adults through 40 years old

Question 25

T/F Pure tones at 500, 1000, 2000, and 4000 Hz are presented at a single level of 20 dB HL

Answer 25

True

Question 26

A ________ screening outcome is failure to respond to one or more test signals at any frequency in either ear

Answer 26

Positive

Question 27

A ________ screening outcome signifies no hearing loss

Answer 27

Negative

Question 28

Specifies hearing sensitivity across the range of frequencies important for everyday communication

Answer 28

Pure-tone Threshold Audiometry

Question 29

Components of Pure-tone Threshold Audiometry (2)

Answer 29

1. Familiarization with the test signal/tone

2. Threshold measurement

Question 30

Response types in Pure-tone threshold audiometry (3)

Answer 30

Raise hand
Raise finger
Push a button
(can be creative if needed)

Question 31

A tone should be presented between __ to __ seconds in duration

Answer 31

1 to 2

Question 32

The tone can be _____ or _____ tones

Answer 32

continuous or pulsed

Question 33

T/F the time intervals between stimuli should be equal in duration

Answer 33

False! They should vary in duration and not be shorter than the test tone

Question 34

What is the most common level of the first tone?

Answer 34

40 dB

Question 35

The procedure of Down 10, Up 5 is called what?

Answer 35

The Modified Method of Limits

Question 36

T/F If the patient responds to a tone, decrease the intensity by 5 dB until the patient stops responding.

Answer 36

FALSE. Decrease the intensity by ten dB

Question 37

T/F If the patient fails to respond to a signal, increase the level of intensity 5 dB until a response occurs.

Answer 37

True. Down 10, Up 5 (The Modified Method of Limits)

Question 38

This occurs when the client responds when a signal was not presented.

Answer 38

False Positive (this can make it difficult to determine threshold)

Question 39

What is the order in which the frequencies are tested for a client?

Answer 39

1000 Hz –> 2000 –> 3000 –> 4000 –> 8000 –> 1000 –> 500 –> 250 Hz

Question 40

The procedure of Down 10, Up 5 is called what?

Answer 40

The Modified Method of Limits