Sensory 3/Hearing (WS 14)

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created 3 years ago by sh7606
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1

Frequency

The distance between any two wave lengths

2

Amplitude

The magnitude in change of pressure
Loudness

3

Pitch

High and low notes corresponding with frequencies of sound waves

4

Threshold Level

The weakest sound wave
a reaction
for sound to be heard

5

Three parts of the ear

1. Outer ear
2. Middle ear
3. Inner ear

6

Outer ear

Visible portion of ear, oracle lobe and external auditory canal

Function- funnels sound to middle ear
Parts-
a. Pinna: directs sound waves into the ear
b. Auditory canal
c. Tympanic membrane: ear drum that separates outer and middle ear

7

Middle ear

Chain of ossicles, ear drum
amplifies sound waves
air filled chamber with temporal bones

Parts-
a. Malleus (hammer)
b. Incus (anvil)
c. Stapes (stirrups): connects to oval window

8

Oval window

An elastic membrane where the feet of the stapes rest

9

Inner ear

Sorts sound by frequency and converts to electrical signals in auditory nerves

Parts-
a. Cochlea: tiny coiled tube embedded in hard bone, connected to the auditory nerve
b. Vestibular apparatus

10

Round Window

Covered with an elastic membrane that vibrates