PSYC 230 UIUC Exam #2 UPDATED
ACTUAL Questions and CORRECT
Answers
Sound stimulus - CORRECT ANSWER -the periodic variations in air pressure traveling
out from the source
Sound waves - CORRECT ANSWER -the waves of pressure changes that occur in the air
as a function of the vibration of a source
Medium of sound - CORRECT ANSWER -A material (solid, liquid, or gas, or
combination of these) through which a wave travels. In water, sound travels 4x faster than it does
through air.
pure tones - CORRECT ANSWER -A sound wave in which changes in air pressure follow
a sine wave pattern.
amplitude - CORRECT ANSWER -the difference between the peak and the baseline of a
wave (height of wave).
loudness - CORRECT ANSWER -Perceptual experience of amplitude
Loud sounds can be dangerous - CORRECT ANSWER -Prolonged contact to sounds over
85 dB can eventually cause hearing loss. Sounds louder than 120 dB are painful. Sounds louder
than 130 dB will generally result in immediate and permanent hearing loss.
Frequency - CORRECT ANSWER -The number of cycles in a sound stimulus that occur
in 1 second
Pitch - CORRECT ANSWER -The subjective experience of frequency
,what unit is used to measure sound amplitude? - CORRECT ANSWER -Hertz (Hz)
What is the hearing range of humans and how does it change with age? - CORRECT
ANSWER -20-20,000 Hz. As people age, hearing in the highest range dissipates. Lowest
frequencies tend to remain stable with age.
Outer ear - CORRECT ANSWER -Pinna, external auditory canal, tympanic membrane
(eardrum)
Pinna - CORRECT ANSWER -Collects sound and funnels it into the auditory canal
External auditory canal - CORRECT ANSWER -conducts sound to the tympanic
membrane, amplifies specific sound frequencies.
Tympanic membrane (eardrum) - CORRECT ANSWER -Thin elastic sheet.
Middle ear - CORRECT ANSWER -Eustachian tube
Tensor tympani
Stapedius
Ossicles:
Malleus (hammer)
Incus (anvil)
Stapes (stirrup)
Eustachian tube - CORRECT ANSWER -Connects the middle ear with the pharynx.
Equalizes air pressure on either side of the eardrum
, Tensor tympani and Stapedius - CORRECT ANSWER -Muscles attached to the malleus
and stapes
Incus (anvil) - CORRECT ANSWER -The middle bone which is connected to the malleus
and hammer, passes vibrations onto the stapes.
Ossicles - CORRECT ANSWER -3 small bones in the middle ear that conduct sound
mechanically, goal is to amplify sounds
Malleus (hammer) - CORRECT ANSWER -Affixed to the tympanic membrane and acts
on the incus
Stapes (stirrups) - CORRECT ANSWER -Vibrates against oval window creating pressure
waves leading to transduction by hair cells on basilar membrane in cochlea
Inner ear - CORRECT ANSWER -functions: transduce sound into a neural signal
Cochlea - CORRECT ANSWER -Snail-shaped structure of the inner ear that houses the
hair cells that transduce sound into a neural signal.
Tympanic canal - CORRECT ANSWER -One of three fluid-filled chambers in the
cochlea. Vibrations travel down it.
Middle canal - CORRECT ANSWER -One of three fluid-filled passages in the cochlea. In
between the tympanic and vestibular canals.
Vestibular canal - CORRECT ANSWER -One of the 3 fluid filled chambers of the
Cochlea. Vibrations travel down it, but not the tympanic canal.
Reissner's membrane - CORRECT ANSWER -A thin sheath of tissue separating the
vestibular and middle canals in the cochlea.
ACTUAL Questions and CORRECT
Answers
Sound stimulus - CORRECT ANSWER -the periodic variations in air pressure traveling
out from the source
Sound waves - CORRECT ANSWER -the waves of pressure changes that occur in the air
as a function of the vibration of a source
Medium of sound - CORRECT ANSWER -A material (solid, liquid, or gas, or
combination of these) through which a wave travels. In water, sound travels 4x faster than it does
through air.
pure tones - CORRECT ANSWER -A sound wave in which changes in air pressure follow
a sine wave pattern.
amplitude - CORRECT ANSWER -the difference between the peak and the baseline of a
wave (height of wave).
loudness - CORRECT ANSWER -Perceptual experience of amplitude
Loud sounds can be dangerous - CORRECT ANSWER -Prolonged contact to sounds over
85 dB can eventually cause hearing loss. Sounds louder than 120 dB are painful. Sounds louder
than 130 dB will generally result in immediate and permanent hearing loss.
Frequency - CORRECT ANSWER -The number of cycles in a sound stimulus that occur
in 1 second
Pitch - CORRECT ANSWER -The subjective experience of frequency
,what unit is used to measure sound amplitude? - CORRECT ANSWER -Hertz (Hz)
What is the hearing range of humans and how does it change with age? - CORRECT
ANSWER -20-20,000 Hz. As people age, hearing in the highest range dissipates. Lowest
frequencies tend to remain stable with age.
Outer ear - CORRECT ANSWER -Pinna, external auditory canal, tympanic membrane
(eardrum)
Pinna - CORRECT ANSWER -Collects sound and funnels it into the auditory canal
External auditory canal - CORRECT ANSWER -conducts sound to the tympanic
membrane, amplifies specific sound frequencies.
Tympanic membrane (eardrum) - CORRECT ANSWER -Thin elastic sheet.
Middle ear - CORRECT ANSWER -Eustachian tube
Tensor tympani
Stapedius
Ossicles:
Malleus (hammer)
Incus (anvil)
Stapes (stirrup)
Eustachian tube - CORRECT ANSWER -Connects the middle ear with the pharynx.
Equalizes air pressure on either side of the eardrum
, Tensor tympani and Stapedius - CORRECT ANSWER -Muscles attached to the malleus
and stapes
Incus (anvil) - CORRECT ANSWER -The middle bone which is connected to the malleus
and hammer, passes vibrations onto the stapes.
Ossicles - CORRECT ANSWER -3 small bones in the middle ear that conduct sound
mechanically, goal is to amplify sounds
Malleus (hammer) - CORRECT ANSWER -Affixed to the tympanic membrane and acts
on the incus
Stapes (stirrups) - CORRECT ANSWER -Vibrates against oval window creating pressure
waves leading to transduction by hair cells on basilar membrane in cochlea
Inner ear - CORRECT ANSWER -functions: transduce sound into a neural signal
Cochlea - CORRECT ANSWER -Snail-shaped structure of the inner ear that houses the
hair cells that transduce sound into a neural signal.
Tympanic canal - CORRECT ANSWER -One of three fluid-filled chambers in the
cochlea. Vibrations travel down it.
Middle canal - CORRECT ANSWER -One of three fluid-filled passages in the cochlea. In
between the tympanic and vestibular canals.
Vestibular canal - CORRECT ANSWER -One of the 3 fluid filled chambers of the
Cochlea. Vibrations travel down it, but not the tympanic canal.
Reissner's membrane - CORRECT ANSWER -A thin sheath of tissue separating the
vestibular and middle canals in the cochlea.
