Pure Tone Testing

Question 1

What is the aim of pure tone testing?

Answer 1

To determine hearing sensitivity across a number of different frequencies. Compare the individual person’s responses to the norms for typically hearing people.

Question 2

T or F: Pure tone testing is a direct measure of hearing

Answer 2

false - we are measuring the persons response to acoustic signals and assuming this is a measure of hearing

Question 3

What is hearing threshold

Answer 3

When the person responds 50% of the time

Question 4

Air conduction testing is done at ______Hz. It measures the response of the whole system.

Answer 4

250 to 8000Hz

Question 5

Bone conduction testing is done at ________Hz.

Answer 5

500 to 6000Hz

Question 6

Bone conduction testing bypasses the ___________ ear and determines _________ sensitivity

Answer 6

outer and middle

sensorineural

Question 7

Why don’t we test bone conduction below 500 Hz?

Answer 7

Too easy to feel

Question 8

Bone conduction is tested at 500 to 6000 Hz due to ________

Answer 8

equipment limitations

Question 9

For pure tone hearing testing the equipment is calibrated so that 0dB HL AC = __________

Answer 9

0 dB HL BC

Question 10

T or F: We need more pressure in the skull to hear bone conduction as loud as air conduction.

Answer 10

True

Question 11

How was audiometric zero for air conduction found?

Answer 11

testing healthy university students

Question 12

How was audiometric zero for bone conduction determined?

Answer 12

An artificial mastoid was used and vibrator output was related to normal threshold of hearing at each freq.

Question 13

Describe the test environment:

Answer 13

Control for external noise
Sound treated or sound isolation booth
One or two rooms
single or double doors

Question 14

What can affect the reliability of a hearing test?

Answer 14

• calibration of equipment
• test environment
• Patient performance/ mood
• instructions
• patients cognitive level
• examiners skill and mood
• client examiner interaction

Question 15

An audiogram is a measure of sound or hearing. _______ is the x-axis and ________ is the y axis

Answer 15

frequency (pple can have deficits at diff freq)

dB HL

Question 16

On an audiogram what symbol and colour represents an :

Air Conduction unmasked Right ear

Answer 16

Red circle

Question 17

On an audiogram what symbol and colour represents an:

Air Conduction unmasked Left ear

Answer 17

Blue X

Question 18

On an audiogram what symbol and colour represents an:

Bone Conduction Unmasked Right ear

Question 19

On an audiogram what symbol and colour represents an:

Bone Conduction Unmasked Left ear

Answer 19

>

Question 20

T or F: It is okay to write both the left and right ear on an audiogram in blue

Answer 20

True

Question 21

T or F: It is okay to write both the left and right ear on an audiogram in red

Answer 21

False

Question 22

On an audiogram for someone with normal hearing both the left and right ear will be equal or better (above) _________ or ________ for children

Answer 22

25dB HL

15 dB HL

Question 23

When preparing to test clients hearing it is important to think about instructions, patient response, headphone placement, bone oscillator placement and your own skill with the equipment.

Answer 23

Yes it is :)

Question 24

List the order for an air conduction hearing test:

Answer 24

Begin with 1000Hz
Test each octave in ascending order (up to 8000Hz)
Retest 1000Hz
Test each octave in descending order (down to 250Hz)

Question 25

When do you need to test interoctave frequencies?

Answer 25

If there is an equal or greater than 20 dB difference between to octaves.

Question 26

How long do you present the tones? Why?

Answer 26

1-2 sec

• 2 seconds is likely too long
  - if they don’t hear it they won’t
• But not less than 500 ms
  - might be too fast to process