EECS 1520- TEST 2 EXAM QUESTIONS
WITH 100% CORRECT ANSWERS |
LATEST VERSION 2025/2026.
A microphone is a... - ANS Transducer, converting audio (sound waves) into an electric signal
Ways of creating digital audio: - ANS Sampling and synthesis
Amplitude (a) - ANS related to intensity
Frequency (f) - ANS related to perceived pitch
Phase (theta) - ANS can depend on the relative location of the sound
Period is measured in... - ANS Hz or cycles/second
Digitizing sound involves... - ANS Taking samples (measurements) at a fixed rate (sampling
rate) and recording them
Too fast sampling rate means... - ANS large audio file
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, Too slow sampling rate... - ANS inaccurate audio file
Nyquist Shannon - ANS sample interval is less than/equal to half of the period
Bit depth - ANS the number of bits of information in each sample
higher bit depth means... - ANS more accurate sample
bit rate - ANS the number of bits that are conveyed or processed per unit of time
higher bit rate means... - ANS better quality, larger file
FLAC (Free Lossless Audio Codec) - ANS Lossless, compression ratio 62%, used for archiving
high quality audio, uses Hoffman and run-length encoding
MP3 (Moving Picture Experts Group Layer 3 Audio) - ANS Lossy, compression ratio 13%,
popular with most mobile devices, uses psychoacoustics and Huffman encoding and lower bit
rates
AAC (Advanced Audio Coding) - ANS Lossy, compression ratio of 14%, popular with Apple
devices/most smartphones, uses psychoacoustic, Huffman and lower bit rates
Colour is typically represented using... - ANS RGB colour model ( other color models are
CMYK, HSL and YUV)
Colours between red, green, blue can be represented by numbers between... - ANS 0 and
255
2 | Page @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
WITH 100% CORRECT ANSWERS |
LATEST VERSION 2025/2026.
A microphone is a... - ANS Transducer, converting audio (sound waves) into an electric signal
Ways of creating digital audio: - ANS Sampling and synthesis
Amplitude (a) - ANS related to intensity
Frequency (f) - ANS related to perceived pitch
Phase (theta) - ANS can depend on the relative location of the sound
Period is measured in... - ANS Hz or cycles/second
Digitizing sound involves... - ANS Taking samples (measurements) at a fixed rate (sampling
rate) and recording them
Too fast sampling rate means... - ANS large audio file
1 | Page @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Too slow sampling rate... - ANS inaccurate audio file
Nyquist Shannon - ANS sample interval is less than/equal to half of the period
Bit depth - ANS the number of bits of information in each sample
higher bit depth means... - ANS more accurate sample
bit rate - ANS the number of bits that are conveyed or processed per unit of time
higher bit rate means... - ANS better quality, larger file
FLAC (Free Lossless Audio Codec) - ANS Lossless, compression ratio 62%, used for archiving
high quality audio, uses Hoffman and run-length encoding
MP3 (Moving Picture Experts Group Layer 3 Audio) - ANS Lossy, compression ratio 13%,
popular with most mobile devices, uses psychoacoustics and Huffman encoding and lower bit
rates
AAC (Advanced Audio Coding) - ANS Lossy, compression ratio of 14%, popular with Apple
devices/most smartphones, uses psychoacoustic, Huffman and lower bit rates
Colour is typically represented using... - ANS RGB colour model ( other color models are
CMYK, HSL and YUV)
Colours between red, green, blue can be represented by numbers between... - ANS 0 and
255
2 | Page @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
