8.5 Hearing Flashcards
1
Q
range of f human hear?
A
20-20,000 Hz
2
Q
human are most sensitive to f btw
A
2,000-5,000 Hz
3
Q
how do we calculate dB?
A
dB=20xLog(P/Po)
4
Q
sound intensity of human speeech?
A
65 dB
5
Q
perylymph is similar to
A
Extracellular fluid composition
6
Q
endolymph composition
A
high [K+]
low [Na+]
(similar to intracellular!)
7
Q
sound E is amplified by two effects:
A
- lever action of the ossicles
2. concentration of sound wave from large tympanic cavity to small oval window
8
Q
Define sound
A
Periodic, longitudinal wave of low and high pressure that propagates in air
9
Q
Define sound frequency
A
Recognize as unique type of sound
10
Q
Define sound Amplitude
A
Corresponds to intensity
11
Q
How can we determine Intensity of sound?
A
By amount of pressure
Measured in dB
12
Q
dB=?
A
20xLog (actual P/reference P)
13
Q
Frequency of normal talking?
A
2,000 Hz
