PSYC 230 UIUC EXAM (2) QUESTIONS WITH COMPLETE SOLUTIONS
GUARANTEED PASS BRAND NEW 2025
1. What is sound?: sound is a vibration that happens in a medium
2. What is a sound stimulus?: periodic variations in air pressure
traveling out from the source and reaching the ears
3. What is a sound wave?: wave of pressure changes that occur in the
air as a function of the vibration of a source
4. Is a medium necessary to conduct sound?: Yes, the sound travels
through the medium to the ears
5. True or false: water and air are examples of mediums: True, they
are mediums
6. How fast does sounds travel?: 761.2 mph
7. True or false: the closer or tighter the molecules are to each
other, the faster they will travel the vibration.: True
8. What are the two pressures of sound in a sound wave called?:
compression
(high pressure) and rarefaction (low pressure)
9. What is frequency measured in?: cycles per second (Hz)
, .
10. What is frequency?: the amount of time between one peak of high
pressure and the next
11. What are pure tones?: sound waves in which air pressure changes
follow a sine wave pattern and vibrate at one frequency
12. What is amplitude of a sound wave?: the different between the
maximum sound and minimum sounds pressures
13. True or false: Amplitude translated to loudness: True, we hear a
wide range of amplitudes
14. True or false: people can discriminate between differences in
loudness very well.: Yes, at differences as low as 1 dB.
15. What are changes in pressure called for sound?: acoustic
pressure
16. True or false: Frequency impacts how fast and far a sound
travels: True, lower frequency sounds travel farther because they
require less energy to keep traveling through a medium
17. What is pitch?: pitch is the subjective experience of frequency
18. What is used to measure sound amplitude?: Hertz
19. What is the relationship between amplitude and sound level?:
larger amplitude = louder sound
20. What is the relationship between frequency and pitch?: the
greater the frequency = higher pitch
, .
21. What is the hearing range of humans?: 20-20,000 Hz
22. Why might older people not be able to hear the full range of
sounds?:
hearing dissipates with age, exposure to loud sounds when young
23. True or false: the lowest frequencies of sound that a person can
hear tend to remain stable with age.: true
24 True or false: below 20 Hz and above 20,000 Hz, human can hear:
false, humans are simply deaf regardless of amplitude at these levels of
sound 25. What is the outer ear?: the par too the ear that is visible to
the outside environment
26. What is the pinna?: the lobe or part that is visible
27. What does the pinna do?: collects sound and funnels it into the
auditory canal
28. What is the external auditory canal?: ear canal; where earwax
accumulates 29. What does the external auditory canal do?:
conducts sound to the tympanic membrane and amplifies sound
frequencies
30. what is the tympanic membrane?: "eardrum"; thin, translucent,
oval membrane that stretches across the ear canal and separates the
middle ear from the outer ear
GUARANTEED PASS BRAND NEW 2025
1. What is sound?: sound is a vibration that happens in a medium
2. What is a sound stimulus?: periodic variations in air pressure
traveling out from the source and reaching the ears
3. What is a sound wave?: wave of pressure changes that occur in the
air as a function of the vibration of a source
4. Is a medium necessary to conduct sound?: Yes, the sound travels
through the medium to the ears
5. True or false: water and air are examples of mediums: True, they
are mediums
6. How fast does sounds travel?: 761.2 mph
7. True or false: the closer or tighter the molecules are to each
other, the faster they will travel the vibration.: True
8. What are the two pressures of sound in a sound wave called?:
compression
(high pressure) and rarefaction (low pressure)
9. What is frequency measured in?: cycles per second (Hz)
, .
10. What is frequency?: the amount of time between one peak of high
pressure and the next
11. What are pure tones?: sound waves in which air pressure changes
follow a sine wave pattern and vibrate at one frequency
12. What is amplitude of a sound wave?: the different between the
maximum sound and minimum sounds pressures
13. True or false: Amplitude translated to loudness: True, we hear a
wide range of amplitudes
14. True or false: people can discriminate between differences in
loudness very well.: Yes, at differences as low as 1 dB.
15. What are changes in pressure called for sound?: acoustic
pressure
16. True or false: Frequency impacts how fast and far a sound
travels: True, lower frequency sounds travel farther because they
require less energy to keep traveling through a medium
17. What is pitch?: pitch is the subjective experience of frequency
18. What is used to measure sound amplitude?: Hertz
19. What is the relationship between amplitude and sound level?:
larger amplitude = louder sound
20. What is the relationship between frequency and pitch?: the
greater the frequency = higher pitch
, .
21. What is the hearing range of humans?: 20-20,000 Hz
22. Why might older people not be able to hear the full range of
sounds?:
hearing dissipates with age, exposure to loud sounds when young
23. True or false: the lowest frequencies of sound that a person can
hear tend to remain stable with age.: true
24 True or false: below 20 Hz and above 20,000 Hz, human can hear:
false, humans are simply deaf regardless of amplitude at these levels of
sound 25. What is the outer ear?: the par too the ear that is visible to
the outside environment
26. What is the pinna?: the lobe or part that is visible
27. What does the pinna do?: collects sound and funnels it into the
auditory canal
28. What is the external auditory canal?: ear canal; where earwax
accumulates 29. What does the external auditory canal do?:
conducts sound to the tympanic membrane and amplifies sound
frequencies
30. what is the tympanic membrane?: "eardrum"; thin, translucent,
oval membrane that stretches across the ear canal and separates the
middle ear from the outer ear
