6 Questions
What is the fundamental frequency of the signal described in the text?
440 Hz
What is the technical term for signals that repeat themselves after some period of time?
Periodic signals
Which device measures variations in air pressure and generates an electrical signal representing sound?
Microphone
What is the unit of frequency used to measure cycles per second?
Hertz
What type of signals can be expressed as the sum of sinusoids with different frequencies?
Spectral decomposition signals
What is the mathematical process of adding two or more signals together called?
Summation
This quiz covers the basics of signals and sounds, including how signals vary in time, how sound is a variation in air pressure, and how a microphone measures and generates electrical signals. It also discusses periodic signals that repeat themselves after some period of time.
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