Audition Flashcards

1
Q

Audition

A

The sense of sound - requires a pressurised sound wave (stimulus) and a hair cell (receptor)

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2
Q

Sound waves

A

Areas of high and low pressure in the air that have wave-like properties

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3
Q

Pinna

A

Outer ear

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4
Q

External Auditory Meatus

A

Ear canal

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5
Q

Tympanic Membrane

A

Eardrum

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6
Q

Ossicles

A

The three bones of the middle ear: malleus (hammer), incus (anvil), stapes (stirrup)

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7
Q

Oval Window

A

Also known as the elliptical window; attached to the stapes; vibration causes fluid on the other side to move and displace

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8
Q

Cochlea

A

The snail-shaped structure of the middle ear containing fluid; it is the site where the auditory signal becomes electrical signals

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9
Q

Organ of Corti

A

An organ in the cochlea that is responsible for sound modulation; it contains the basilar and tectorial membranes that split the cochlea into two

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10
Q

Auditory Nerve

A

The nerve that transports auditory signals to the brain

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11
Q

Place Theory of Hearing

A

Perception of sound depends on where the frequency produces vibrations along the basilar membrane. In other words, different sound waves trigger activity at different places along the basilar membrane

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12
Q

Outer ear

A

The pinna and external auditory meatus

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13
Q

Middle Ear

A

The ossicles

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14
Q

Inner Ear

A

Cochlea, organ of corti, and semicircular canals

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15
Q

Hair bundle

A

A structure in the cochlea that is composed of filaments called kinocillium

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16
Q

Auditory Processing

A

The process by which the brain interprets signals from the cochlea

17
Q

Basilar Tuning

A

Certain wavelengths activate certain areas of the cochlea. High frequencies activate closer to the base; lower frequencies activate closer to the apex

18
Q

Tonotopical Mapping

A

The ability of the brain to distinguish different frequencies based off of basilar tuning

19
Q

Primary Auditory Cortex

A

A section of the temporal lobe that receives all auditory input and processes them

20
Q

Sensory Narrow Hearing Loss

A

Nerve deafness that can be corrected with a cochlear implant (invovles the use of a transmittor that sends to a receiver which sends signals to the stimulator)

21
Q

Frequency Theory of Hearing

A

Our perception of sound is dependent on how fast the nerve cells in the cochlea fire. Faster firing => greater pitch