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.

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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

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