Physiology of Ear Flashcards
1
Q
Interaural Time Difference
A
Useful for low frequencies
2
Q
Interaural intensity or level difference
A
useful above 2kHz
3
Q
Cerumen of EAM
A
produced by glands in the cartilaginous portion
4
Q
Pinna
A
Acts as collecting horn, channels sounds
5
Q
Transfer Function
A
Sound field measured at different points
6
Q
First resonant frequency of ear canal
A
3.3 kHz
7
Q
Second resonant frequency
A
8 and 11 kHz
8
Q
Anharmonic second resonance
A
due to inhomogeneity of ear canal
9
Q
Ear canal entrance
A
2 mm inside ear canal
10
Q
Increase of pressure at TM of resonant freq
A
10-14 dB
11
Q
Gain for speech perception of ear canal
A
10-20 dB gain
12
Q
Directionality of signal is affected above…
A
5 kHz
13
Q
Increase of pressure depending on frequency?
A
15 dB
