Physiology of hearing Flashcards
1
Q
Range of human hearing
- Frequency
- Sound pressure level
A
Frequency
- 20 Hz- 20,000Hz
- Most sensitive to around 4000 Hz
- Human speech ranges around 100-10000Hz
Sound pressure
- Physical discomfort occurs around 100 dB.
2
Q
Middle ear mechanism of sound transduction
A
Main function- increases pressure to prevent reflection of sound in the cochlea
Tympanic membrane–> Oval window = increases pressure by 45x
Lever action of middle ear ossicles [malleus, incus, stapes]–> Increases pressure by 1.5x