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PSYC 230 UIUC EXAM 2 NEWEST 2024 NEWEST
2024 ACTUAL EXAM 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
What is sound? - ANSWER- sound is a vibration that happens in a medium
What is a sound stimulus? - ANSWER- periodic variations in air pressure traveling out from the source and reaching the ears
What is a sound wave? - ANSWER- wave of pressure changes that occur in the air as a function of the vibration of a source
Is a medium necessary to conduct sound? - ANSWER- Yes, the sound travels through the medium to the ears
True or false: water and air are examples of mediums -
ANSWER- True, they are mediums
How fast does sounds travel? - ANSWER- 761.2 mph
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True or false: the closer or tighter the molecules are to each
other, the faster they will travel the vibration. - ANSWER- True
What are the two pressures of sound in a sound wave called? - ANSWER- compression (high pressure) and rarefaction (low pressure)
What is frequency measured in? - ANSWER- cycles per second (Hz)
What is frequency? - ANSWER- the amount of time between one peak of high pressure and the next
What are pure tones? - ANSWER- sound waves in which air pressure changes follow a sine wave pattern and vibrate at one frequency
What is amplitude of a sound wave? - ANSWER- the different between the maximum sound and minimum sounds pressures
True or false: Amplitude translated to loudness - ANSWER-
True, we hear a wide range of amplitudes
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True or false: people can discriminate between differences in
loudness very well. - ANSWER- Yes, at differences as low as 1 dB.
What are changes in pressure called for sound? - ANSWER- acoustic pressure
True or false: Frequency impacts how fast and far a sound
travels - ANSWER- True, lower frequency sounds travel farther because they require less energy to keep traveling through a medium
What is pitch? - ANSWER- pitch is the subjective experience of frequency
What is used to measure sound amplitude? - ANSWER- Hertz
What is the relationship between amplitude and sound level? - ANSWER- larger amplitude = louder sound
What is the relationship between frequency and pitch? - ANSWER- the greater the frequency = higher pitch
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What is the hearing range of humans? - ANSWER- 20-20,000 Hz
Why might older people not be able to hear the full range of sounds? - ANSWER- hearing dissipates with age, exposure to loud sounds when young
True or false: the lowest frequencies of sound that a person can
hear tend to remain stable with age. - ANSWER- true
True or false: below 20 Hz and above 20,000 Hz, human can
hear - ANSWER- false, humans are simply deaf regardless of amplitude at these levels of sound
What is the outer ear? - ANSWER- the par too the ear that is visible to the outside environment
What is the pinna? - ANSWER- the lobe or part that is visible
What does the pinna do? - ANSWER- collects sound and funnels it into the auditory canal
What is the external auditory canal? - ANSWER- ear canal; where earwax accumulates
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