MUS 447 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (GRADED A+)
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Course
MUS 447
Institution
MUS 447
MUS 447 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (GRADED A+)
Sound - Answers A vibration through a physical medium as perceived by the ear (Most commonly, the perception of fluctuations of air pressure)
How is sound transmitted? - Answers 1. Vibrating sound source
2. Medium of transmission (air,...
Microphone - Answers A device that converts sound into an electrical signal
Loudspeaker - Answers A device that converts an electrical signal into a corresponding sound
Electro-acoustic transducer - Answers a device that converts acoustic energy into electrical energy or
vice versa
Transducer - Answers a device that convert one type of energy to another
Analog Signal - Answers an electrical signal which represents sound
Composing with representations of sound, a composer can - Answers Create music:
- involving real environment sounds
, -employs non-traditional modes of notation and performance
-using skills learned outside of traditional academic settings
-where sound materials are free from their typical associations — where sound events are no long
evocation symbols, but rather pure "sound objects"
Storing representations of sound - Answers Allows for layering, mixing, and manipulation of sonic
material in an electroacoustic music composition
Analog-to-digital converter - Answers A device which converts an analog signal into a digital
representation of the sound (a series of numbers that represent the fluctuating voltage of the analog
signal)
Digital-to-analog converter - Answers A device which takes the series of stored numbers—the digital
representation of the sound—and converts it back to an analog signal
Waveform - Answers A graphic depiction of sound which shows the fluctuation of air pressure, voltages,
or digital values over time
Cycle - Answers A single, complete occurrence of a waveform
Period - Answers The timespan occupied by one cycle
Wavelength - Answers The distance between the same point in two adjacent cycles. Measured in meters
Frequency (in terms of waveform) - Answers the rate at which one cycle of a waveform is completed
(Hz/cycles per second)
Amplitude (in terms of waveform) - Answers Refers to the strength of the waveform (in terms of air
pressure changes) (-1 to 1)
Periodic - Answers a wave with a continuously repeating cycle (Clear, precise tones, eg., sine, triangle,
saw, and square waves)
Non-periodic - Answers a wave that doesn't have a continuously repeating cycle (speech, cello, birds, car
horns, etc.)
Phase - Answers Used to specify a point on a waveform (0 to 360 degrees-
90, 180, 270 degrees mark the ¼, ½, and ¾ points respectively)
Digital Sampling - Answers The process of converting an analog signal into digital representation of
sound
Sample - Answers One measurements of an instantaneous amplitude of an analog signal by an ADC (in
digital sampling)
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