©THESTAR 2025 ALL RIGHTS RESERVED 11:24 PM A+
PSYC 230 Unit 5 Exam Questions And
Answers |Latest 2025 | Guaranteed Pass.
Sound Stimulus - Answer✔Periodic variations in air pressure traveling out from a 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✔Necessary to conduct sound, changes based on the medium
-in water, sound travels four times faster than it does through air
Pure Tones - Answer✔Sound waves in which air pressure changes follow a sine wave pattern
Amplitude - Answer✔Difference between the maximum and minimum sound pressures
-height of the wave determines how loud; bigger the wave the louder the sound
-measured in Hertz (Hz)
Loudness - Answer✔Perceptual experience of amplitude
-measured in decibels (dB)
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
What is the frequency of sound? - Answer✔Can be measured in cycles, the amount of time
between one peak of high pressure and the next
1|Page
, ©THESTAR 2025 ALL RIGHTS RESERVED 11:24 PM A+
What is Pitch? - Answer✔Number of up and down cycles of a frequency determines pitch,
measured in Hertz (Hz)
What is the hearing range of humans? - Answer✔Children and young adults can hear over the
range of 20 to 20,000 Hz
How does hearing change with age? - Answer✔As you age, it gets harder to hear higher
frequencies/pitches
Outer Ear - Answer✔Contains:
-pinna
-external auditory canal
-tympanic membrane (eardrum)
Pinna - Answer✔Collects sound and funnel it into the auditory canal
-located in outer ear
External Auditory Canal - Answer✔Conducts sound to tympanic membrane (ear drum) and
amplifies specific sound frequencies
-located in outer ear
Tympanic Membrane (eardrum) - Answer✔Thin elastic sheet that vibrates as the pressure
changes enter your ear
-located in outer ear
Middle Ear - Answer✔Contains:
-ossicles
-Malleus (hammer)
-Incus (anvil)
-Stapps (stirrup)
-eustachian tube
-tensor tympani
-stapedius
Ear infections are result of build up of mucus in middle ear; everything becomes inflamed and
swollen because the mucus causes pressure on the eardrum
2|Page
PSYC 230 Unit 5 Exam Questions And
Answers |Latest 2025 | Guaranteed Pass.
Sound Stimulus - Answer✔Periodic variations in air pressure traveling out from a 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✔Necessary to conduct sound, changes based on the medium
-in water, sound travels four times faster than it does through air
Pure Tones - Answer✔Sound waves in which air pressure changes follow a sine wave pattern
Amplitude - Answer✔Difference between the maximum and minimum sound pressures
-height of the wave determines how loud; bigger the wave the louder the sound
-measured in Hertz (Hz)
Loudness - Answer✔Perceptual experience of amplitude
-measured in decibels (dB)
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
What is the frequency of sound? - Answer✔Can be measured in cycles, the amount of time
between one peak of high pressure and the next
1|Page
, ©THESTAR 2025 ALL RIGHTS RESERVED 11:24 PM A+
What is Pitch? - Answer✔Number of up and down cycles of a frequency determines pitch,
measured in Hertz (Hz)
What is the hearing range of humans? - Answer✔Children and young adults can hear over the
range of 20 to 20,000 Hz
How does hearing change with age? - Answer✔As you age, it gets harder to hear higher
frequencies/pitches
Outer Ear - Answer✔Contains:
-pinna
-external auditory canal
-tympanic membrane (eardrum)
Pinna - Answer✔Collects sound and funnel it into the auditory canal
-located in outer ear
External Auditory Canal - Answer✔Conducts sound to tympanic membrane (ear drum) and
amplifies specific sound frequencies
-located in outer ear
Tympanic Membrane (eardrum) - Answer✔Thin elastic sheet that vibrates as the pressure
changes enter your ear
-located in outer ear
Middle Ear - Answer✔Contains:
-ossicles
-Malleus (hammer)
-Incus (anvil)
-Stapps (stirrup)
-eustachian tube
-tensor tympani
-stapedius
Ear infections are result of build up of mucus in middle ear; everything becomes inflamed and
swollen because the mucus causes pressure on the eardrum
2|Page
