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COMD 5070 final prep Questions & Answers 100% Correct!! $11.99   Add to cart

Exam (elaborations)

COMD 5070 final prep Questions & Answers 100% Correct!!

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  • Course
  • COMD 5070
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  • COMD 5070

As sound travels through air, it does so as a - ANSWER-longitudinal pressure wave The period of a sine wave - ANSWER-is shorter for higher frequency sounds Pressure can de defined as - ANSWER-force divided by area Intensity can be defined as - ANSWER-power per unit area The inverse squa...

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  • August 21, 2024
  • 7
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • COMD 5070
  • COMD 5070
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papersbyjol
COMD 5070 final prep
Questions & Answers 100%
Correct!!
As sound travels through air, it does so as a - ANSWER-longitudinal pressure wave



The period of a sine wave - ANSWER-is shorter for higher frequency sounds



Pressure can de defined as - ANSWER-force divided by area



Intensity can be defined as - ANSWER-power per unit area



The inverse square law means that - ANSWER-intensity decreases by a factor equal to the square of
the change in distance



Based on the equal loudness curves figure (2-18, p33), a 100 Hz tone would need to be
approximately how many dB in intensity to sound equally loud to a 1000 Hz tone at 40 dB? -
ANSWER-53 dB



A power spectrum is a type of - ANSWER-frequency domain plot



Resonance occurs when - ANSWER-the applied force is at a frequency that matches the natural
frequency of an object



which of the following is an analog signal? - ANSWER-speech sounds in air

musical tones in air

displacement of the middle ear bones

, all of the above



an analog signal (e.g. from a microphone) - ANSWER-is continuous in amplitude

is continuous in time



both of the above



a table of numbers could fully represent - ANSWER-a digital signal



you cannot listen to digital sound via digital headphones - ANSWER-because the sound is really
generated by analog loudspeakers



We can typically perceive smaller differences in the pitch of two sounds if they are - ANSWER-two
lower frequencies



The human voice as a complex tone is best described as - ANSWER-nearly periodic




quantization refers to - ANSWER-the assignment of an analog value to the nearest digital value
available



an 8-bit A/D system has how many quantization levels? - ANSWER-256



The sampling theorem indicates - ANSWER-the minimum sample rate needed to perfectly
reconstruct a signal



aliasing during digital recording means that - ANSWER-a sinusoid is transformed into a different
frequency



anti-aliasing filtering - ANSWER-removes frequency components above the Nyquist frequency



Low-pass filtering during DAC playback - ANSWER-is mandatory to eliminate the 'steps' in the analog
waveform

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