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CD 351 - Final Exam questions with complete solutions graded A+ passed
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CD 351 - Final Exam questions with complete solutions graded A+ passed
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CD 351 - Final ExamWhat is loudness?: - correct answer ✔✔the perceived magnitude of intensity perceptual correlate to
intensity
How do we measure loudness?: - correct answer ✔✔you cannot be given a dB value because it is
different from person to person. Clinically, you may rank noises from soft to loud in both direct and
indirect manners
how is loudness measured (direct/indirect)?: - correct answer ✔✔- direct: Sone scale, Steven's power
function
- indirect: Phon scale, Fletcher-Munson equal loudness curve
what is alternating loudness balance?: - correct answer ✔✔- test where you adjust the second sound
until it has the same loudness as the first
- occurs in the same ear
what is simultaneous loudness balance?: - correct answer ✔✔sound 1 is constant in one ear and sound 2
is adjusted in the other ear until they are perceived to be the same loudness
True or False: The pitches have to be the same when measuring loudness indirectly. - correct answer
✔✔False, you can measure different pitches and sounds
what is the Fletcher-Munson graph?: - correct answer ✔✔it depicts the level and frequency required to
have the second sound equivalent to an original set tone
how do you read the Fletcher-Munson graph?: - correct answer ✔✔if you hear a frequency of X-AXIS
VALUE, it requires a loudness of Y-AXIS VALUE to sound the same as the original tone (typically 1,000 Hz
@ given loudness)
, what is the 10 phon line?: - correct answer ✔✔it represents tones with equal loudness @10 dB for a
given frequency
how does loudness grow?: - correct answer ✔✔perception of loudness relies on frequency. Grows more
rapidly at low frequencies and linearly after that
True or False: Loudness perception relies on frequency. - correct answer ✔✔True
True or False: Mid-frequencies tend to have equal dB SPL values. - correct answer ✔✔True
True or False: The frequency makes a big difference in intensity perception for any given intensity. -
correct answer ✔✔False, for loud sounds (higher dB values) frequency has a less significant effect.
What is the minimum audible field?: - correct answer ✔✔the threshold for tones coming from a speaker
What do equal loudness contours show?: - correct answer ✔✔that loudness relies on frequency
what is a problem with the phon scale?: - correct answer ✔✔we do not know how much louder 40 phon
is to 20 phon
what is magnitude estimation?: - correct answer ✔✔you hear 2 sounds, you have to describe the sounds
using qualifiers like 2x, 4x, 1/2, 1/4, etc.
how are numbers chosen for magnitude estimation?: - correct answer ✔✔the person gives arbitrary
numbers that are then averaged to make a common scale
what is magnitude production?: - correct answer ✔✔person is told to adjust the sound until it reaches a
certain numerical value
what does a magnitude estimation graph look like?: - correct answer ✔✔linear after 30dB
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