Physiology of hearing Flashcards Preview

202: Theme 2, Sensory inputs and motor outputs > Physiology of hearing > Flashcards

Flashcards in Physiology of hearing Deck (2)
1

Range of human hearing
- Frequency
- Sound pressure level

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

Middle ear mechanism of sound transduction

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