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Eecs 1520 Midterm 2 Exam Questions With 100% Correct Answers | Latest Version 2025/2026.

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Sound waves are a form of: - ANS Analog Electrical signals are a form of: - ANS Digital What is microphone also known as: - ANS A transducer What converts sounds waves to electrical signals? - ANS A microphone (transducer) What do speakers do? - ANS Convert digital into sound waves What is the term for converting analog into digital? - ANS Sampling What is the term for the production of sound waves? - ANS Synthesis Define this formula: S(t) =

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EECS 1520 MIDTERM 2 EXAM
QUESTIONS WITH 100% CORRECT
ANSWERS | LATEST VERSION 2025/2026.




Sound waves are a form of: - ANS Analog



Electrical signals are a form of: - ANS Digital



What is microphone also known as: - ANS A transducer



What converts sounds waves to electrical signals? - ANS A microphone (transducer)



What do speakers do? - ANS Convert digital into sound waves



What is the term for converting analog into digital? - ANS Sampling



What is the term for the production of sound waves? - ANS Synthesis



Define this formula: S(t) = 𝑎 sin(2 𝜋 𝑓(𝑡 − 0)) - ANS a = amplitude
f = frequency
t = time (final)

1 | Page @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED

, 0 = phase (time shift or starting time)



What is the unit for amplitude? - ANS dB (decibel)



What is the unit for frequency? - ANS Hz (hertz)



Amplitude is known as - ANS Intensity (loudness)



Frequency is known as - ANS Perceived pitch



The average human hearing frequency in Hz is - ANS 16 Hz to 20 kHz



Sampling/samples are known as - ANS Measurements



What is sampling rate? - ANS It is a fixed rate



Increased sampling rate means - ANS Larger file and better quality



Decreased sampling rate means - ANS Smaller file and lower quality/inaccurate



Who gave the idea of sample interval < half period? - ANS Nyquist-Shannon



Higher bit depth means: - ANS A more accurate sample



What is known to use <8 bits - ANS To record physical processes (not used to record sound)
such as blood pressure, heartbeat, motion due to walking/running



2 | Page @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED

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