Bone Conduction Audiometry

Question 1

This type of conduction bypasses the outer and middle ear and stimulates the cochlea directly

Answer 1

Bone conduction

Question 2

This type of conduction goes through the outer and middle ear and then stimulates the cochlea

Answer 2

Air conduction

Question 3

Two locations you can place the oscillator

Answer 3

1. Mastoid Placement - more difficult placement; it can move around some; greater variability in bone conduction found across listeners
2. Forehead Placement - less curvature so it makes placement easier, BUT more force is required at the forehead to elicit a response

Question 4

Test procedures of Bone Conduction

Answer 4

1. Position the bone conduction oscillator behind the pinna (hair should be moved aside, it should not contact the pinna, the test ear is uncovered during testing - no earphones)
2. The threshold search technique is the same as for air-conduction testing
3. Test variability (test-retest variability is greater for bone-conduction audiometry than for air-conduction tests)

Question 5

The thresholds of bone conduction are limited to ___ - ___ Hz

Answer 5

250-4000 Hz

Question 6

Progression of frequency testing:

Answer 6

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

Question 7

Down 10, Up 5

Answer 7

The modified method of limits