Bone conduction testing

Question 1

frequencies tested for bone conduction

Answer 1

250-4000 Hz

Question 2

why use masking in bone conduction testing?

Answer 2

to ensure that the sound is being perceived by the inner ear of the ear being tested, not the opposite ear

Question 3

mastoid vs forehead placement (pros / cons)

Answer 3

mastoid = more accurate but unstable
forehead = stable, needs more dB and correction factors