Exam 2 Flashcards
Rules out participation by the non-test ear
Masking
When sound presented to the test ear arrives at the cochlea of the non-test ear
Crossover
How can crossover occur (2)?
Sounds leaks around the headphones and travel by air conduction, BC by vibrations through the skull
Drop in intensity of a sound as it crosses over to the non-test ear
Interaural attenuation
What is the maximum interaural attenuation by AC?
60 dB
What is the minimum interaural attenuation by AC?
40 dB
What is the interaural attenuation we should assume by AC?
40 dB
What is the actual interaural attenuation by AC?
40-50 dB
What is the maximum interaural attenuation by BC?
10-15 dB
What is the minimum interaural attenuation by BC?
0 dB
What is the actual interaural attenuation by BC?
0-10 dB
What interaural attenuation should we assume by BC?
10 dB
Audiogram of left ear or right ear mirrors the other ear and has a difference of 40 dB
Shadow curve
When do we mask during AC?
AC threshold minus of test ear BC of non-test ear is greater than or equal to 40 dB
When do we mask during BC?
AC threshold in test ear minus BC threshold of test ear is greater than 0