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PSYCH 230 EXAM 2 UIUC KZ QUESTIONS AND ANSWERS
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PSYCH 230 EXAM 2 UIUC KZ QUESTIONS AND ANSWERS
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PSYCH 230 EXAM 2 UIUC KZ QUESTIONS ANDANSWERS
S cones - Answers- short wavelengths
M cones - Answers- medium wavelengths
L cones - Answers- long wavelengths
Scotopic - Answers- rods and nightime vision
Phototopic - Answers- cones and daytime vision
Superior colliculus - Answers- itiating and guiding eye movements
Saccade - Answers- rapid eye movement from one object to other
Sound stimuus - Answers- periodic variations in air pressure traveling out from a source
Sound waves - Answers- the waves of pressure changes that occur in the air as a
function of the vibration of a source
What's a medium? - Answers- is necessary to conduct sound; air, water
In water, does sound travel four times as faster than it does through air? - Answers- yes
Does sound travel faster but slower than light? - Answers- yes
Example: thunder and lightening
How is frequency measured? Unit? - Answers- in cycles. The amount of time between
one peak of high pressure and the next.
Hertz
-how many ups and downs
Do waves diminish when you move away from the source? - Answers- yes
Pure tones - Answers- sound waves in which air pressure changes follow the basic sine
wave pattern
Are pure tones a simple type of sound that we rarely encounter in our daily life? -
Answers- yes
,Amplitude? Unit? - Answers- Height of a wave. & loudness
Decibel db
What is the hearing range of humans? - Answers- more than 85db
Pitch? Unit? - Answers- How high or low a sound is
Hertz
-subjective experience of frequency.
Does low pitch have less up and down repetitions? - Answers- yes
What db amount is when you begin to lose you're hearing
Sounds louder than __db are painful
Sound louder than __dbresult in immediate permanent hearing loss - Answers- 85db
120
130
Children and young adults can hear over the range of __ to __ Hz - Answers- 20-
20,000
By the time one is 50 yrs old, the user limit may be down to ___ Hz - Answers- 12,000
Do the lowest frequencies tend to remain stable with age? - Answers- yes
The physical unit tht measure sound amplitude is known as_ - Answers- decibal
A sound wave in which changes in air pressure following sine wave pattern is known
as____ - Answers- pure tone
Pinna - Answers- the visible part of the ear
-collects sound and funnels it into auditory canal
External auditory canal - Answers- conducts sound to tympanic membrane
Amplifies specific sound frequencies ***
Tympanic membrane aka eardrum - Answers- thin elastic sheet
-pressure changes will enter and it'll make ear drum vibrate
, Ossicles & it's purpose - Answers- conduct sound mechanically
-amplifiy sounds
-smallest bones in your body
Malleus (hammer) - Answers- a small bone in the middle ear that transmits vibrations of
the eardrum to the incus.
What do the stapes (stirrup) do - Answers- the stapes pushes against the oval window
of the cochlea and sound moves into the inner ear
Incus (anvil) - Answers- transmits and amplifies vibrations from the malleus to the
stapes
Ear infection - Answers- inflammation, mucus, and it creates a lot of pressure
Eustachian tube - Answers- connects the middles ear w the pharynx (THROAT)
-equalizes air pressure on either side of the eardrum
What are the muscles attached to the malleus and stapes - Answers- tensor tympani &
stapedius
What do tensor tympani and stapedius do? - Answers- they tense in the presence of
very loud noises& protect us from loud noises
T/F: hair cells along the organ of court in the cochlea receive vibrations and convert
them into neural signal - Answers- true
Cochlea - Answers- Snail-shaped structure of the inner ear that houses the hair cells
Within the cochlea are three liquid-filled chambers: - Answers- Tympanic canal
Middle canal
Vestibular canal
Basilar membrane - Answers- composed of fibers & support cells
-base and support of corti w hairs
-responds to sounds w high or low pitch
What are the two hair types humans have? - Answers- outer hair cells
Inner hair cells
What do hair cells convey? - Answers- info to the brain
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