Ch. 4: Pure-Tone Audiometry

Question 1

How is hearing tested

&

what is equipment called?

Answer 1

Audiometer

Question 2

What is the process of pure tone testing?

Answer 2

1. Instuctions
2. Place device onto patient (headplugs)
3. Present the Sound (Threshold Pattern - down 10, up 5)

Question 3

Definition of threshold

Answer 3

The patient hears and responds to the soud at least 50% of the time

Question 4

What frequencies are typically tested?

Answer 4

Typical: 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz

Question 5

Why might additional frequencies (inter-octaves) be tested?

Answer 5

Interoctaves (threshold is > 20 dB): 750Hz, 1.5kHz, 3kHz, 6kHz

Question 6

What threshold is the cut off for normal?

Answer 6

Adults: 20 dBHL

Children: 15 dBHL

Question 7

Know the shapes, symbols used, type of hearing loss

Answer 7

• AC
  
  • Right: red O
  • Left: blue X
• BC
  
  • Right: red <
  • Left: blue: >

Question 8

Directions for Testing

Answer 8

• Instructions
• Clinician plays sound
• Raise hand when you hear the sound
• Place device onto patient

Question 9

Responses from patient (what could they be)?

Answer 9

Raising hands

Pushing a button

Question 10

Devices used for Testing (Bone and Air)?

Answer 10

AC: Headphones or insert

BC: Bone occilator

Question 11

Air Bone Gap

Answer 11

> 10 dB between Bone conduction and Ait conduction scores