PSYC 230 UIUC Exam #2 2025/2026
Exam Questions with 100% Correct
Answers | Latest Update
Sound stimulus - 🧠 ANSWER ✔✔the periodic variations in air pressure
traveling out from the source
Sound waves - 🧠 ANSWER ✔✔the waves of pressure changes that occur
in the air as a function of the vibration of a source
Medium of sound - 🧠 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 - 🧠 ANSWER ✔✔A sound wave in which changes in air
pressure follow a sine wave pattern.
,amplitude - 🧠 ANSWER ✔✔the difference between the peak and the
baseline of a wave (height of wave).
loudness - 🧠 ANSWER ✔✔Perceptual experience of amplitude
Loud sounds can be dangerous - 🧠 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 - 🧠 ANSWER ✔✔The number of cycles in a sound stimulus that
occur in 1 second
Pitch - 🧠 ANSWER ✔✔The subjective experience of frequency
what unit is used to measure sound amplitude? - 🧠 ANSWER ✔✔Hertz (Hz)
What is the hearing range of humans and how does it change with age? - 🧠
ANSWER ✔✔20-20,000 Hz. As people age, hearing in the highest range
dissipates. Lowest frequencies tend to remain stable with age.
Outer ear - 🧠 ANSWER ✔✔Pinna, external auditory canal, tympanic
membrane (eardrum)
Pinna - 🧠 ANSWER ✔✔Collects sound and funnels it into the auditory canal
,External auditory canal - 🧠 ANSWER ✔✔conducts sound to the tympanic
membrane, amplifies specific sound frequencies.
Tympanic membrane (eardrum) - 🧠 ANSWER ✔✔Thin elastic sheet.
Middle ear - 🧠 ANSWER ✔✔Eustachian tube
Tensor tympani
Stapedius
Ossicles:
Malleus (hammer)
Incus (anvil)
Stapes (stirrup)
Eustachian tube - 🧠 ANSWER ✔✔Connects the middle ear with the
pharynx. Equalizes air pressure on either side of the eardrum
Tensor tympani and Stapedius - 🧠 ANSWER ✔✔Muscles attached to the
malleus and stapes
Incus (anvil) - 🧠 ANSWER ✔✔The middle bone which is connected to the
malleus and hammer, passes vibrations onto the stapes.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Ossicles - 🧠 ANSWER ✔✔3 small bones in the middle ear that conduct
sound mechanically, goal is to amplify sounds
Malleus (hammer) - 🧠 ANSWER ✔✔Affixed to the tympanic membrane and
acts on the incus
Stapes (stirrups) - 🧠 ANSWER ✔✔Vibrates against oval window creating
pressure waves leading to transduction by hair cells on basilar membrane
in cochlea
Inner ear - 🧠 ANSWER ✔✔functions: transduce sound into a neural signal
Cochlea - 🧠 ANSWER ✔✔Snail-shaped structure of the inner ear that
houses the hair cells that transduce sound into a neural signal.
Tympanic canal - 🧠 ANSWER ✔✔One of three fluid-filled chambers in the
cochlea. Vibrations travel down it.
Middle canal - 🧠 ANSWER ✔✔One of three fluid-filled passages in the
cochlea. In between the tympanic and vestibular canals.
Vestibular canal - 🧠 ANSWER ✔✔One of the 3 fluid filled chambers of the
Cochlea. Vibrations travel down it, but not the tympanic canal.
Exam Questions with 100% Correct
Answers | Latest Update
Sound stimulus - 🧠 ANSWER ✔✔the periodic variations in air pressure
traveling out from the source
Sound waves - 🧠 ANSWER ✔✔the waves of pressure changes that occur
in the air as a function of the vibration of a source
Medium of sound - 🧠 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 - 🧠 ANSWER ✔✔A sound wave in which changes in air
pressure follow a sine wave pattern.
,amplitude - 🧠 ANSWER ✔✔the difference between the peak and the
baseline of a wave (height of wave).
loudness - 🧠 ANSWER ✔✔Perceptual experience of amplitude
Loud sounds can be dangerous - 🧠 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 - 🧠 ANSWER ✔✔The number of cycles in a sound stimulus that
occur in 1 second
Pitch - 🧠 ANSWER ✔✔The subjective experience of frequency
what unit is used to measure sound amplitude? - 🧠 ANSWER ✔✔Hertz (Hz)
What is the hearing range of humans and how does it change with age? - 🧠
ANSWER ✔✔20-20,000 Hz. As people age, hearing in the highest range
dissipates. Lowest frequencies tend to remain stable with age.
Outer ear - 🧠 ANSWER ✔✔Pinna, external auditory canal, tympanic
membrane (eardrum)
Pinna - 🧠 ANSWER ✔✔Collects sound and funnels it into the auditory canal
,External auditory canal - 🧠 ANSWER ✔✔conducts sound to the tympanic
membrane, amplifies specific sound frequencies.
Tympanic membrane (eardrum) - 🧠 ANSWER ✔✔Thin elastic sheet.
Middle ear - 🧠 ANSWER ✔✔Eustachian tube
Tensor tympani
Stapedius
Ossicles:
Malleus (hammer)
Incus (anvil)
Stapes (stirrup)
Eustachian tube - 🧠 ANSWER ✔✔Connects the middle ear with the
pharynx. Equalizes air pressure on either side of the eardrum
Tensor tympani and Stapedius - 🧠 ANSWER ✔✔Muscles attached to the
malleus and stapes
Incus (anvil) - 🧠 ANSWER ✔✔The middle bone which is connected to the
malleus and hammer, passes vibrations onto the stapes.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Ossicles - 🧠 ANSWER ✔✔3 small bones in the middle ear that conduct
sound mechanically, goal is to amplify sounds
Malleus (hammer) - 🧠 ANSWER ✔✔Affixed to the tympanic membrane and
acts on the incus
Stapes (stirrups) - 🧠 ANSWER ✔✔Vibrates against oval window creating
pressure waves leading to transduction by hair cells on basilar membrane
in cochlea
Inner ear - 🧠 ANSWER ✔✔functions: transduce sound into a neural signal
Cochlea - 🧠 ANSWER ✔✔Snail-shaped structure of the inner ear that
houses the hair cells that transduce sound into a neural signal.
Tympanic canal - 🧠 ANSWER ✔✔One of three fluid-filled chambers in the
cochlea. Vibrations travel down it.
Middle canal - 🧠 ANSWER ✔✔One of three fluid-filled passages in the
cochlea. In between the tympanic and vestibular canals.
Vestibular canal - 🧠 ANSWER ✔✔One of the 3 fluid filled chambers of the
Cochlea. Vibrations travel down it, but not the tympanic canal.
