Masking

Question 1

What is the beat rate?

Answer 1

Difference between masking tone and target tone

Question 2

What is the beat frequency?

Answer 2

Average between target tone and masking tone

Question 3

What are the 3 things we learn from Wegel and Lane’s experiments?

Answer 3

1.) As the target frequency gets closer to the masker frequency, the more effective the masker is.
2.) When the target frequency and the masker frequency are very close together, beats occur
3.) You get beats at the harmonics of the masker frequency because of cochlear nonlinearities

Question 4

What is a critical band?

Answer 4

The smallest range of frequencies that activate the same area of the basilar membrane in the cochlea

Question 5

Why is the cubic difference tone important?

Answer 5

1.) It is why beating occurs
2.) It generates the biggest response on the BM
3.) Non-linear properties of OHC generate the CDT

Question 6

What is the equation for the cubic difference tone?

Answer 6

2f1-f2

Question 7

What is forward masking?

Answer 7

Signal is presented after the masker

Question 8

What is backward masking?

Answer 8

Signal is presented before the masker

Question 9

How do you create an equal loudness contour?