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WorksheetsiGCSE Computer Science: Digital Audio
Total questions: 10
Worksheet time: 6mins
What piece of hardware is used to sample a sound wave?
Digital-analogue converter
Wave synthesizer
Microphone
Analogue-digital converter
What does the bit rate of a sampled sound refer to?
The number of bits used for 1 second of audio
The number of bits used for every sample
The final file size of the sampled sound
The speed at which the sampled sound is played back
What is the standard sampling frequency for CD audio?
20,000 Hz
44,100 Hz
33,300 Hz
96,000 Hz
What is the main uncompressed audio file format?
.mp3
.mp4
.wav
.mov
What is most commonly used compressed audio file format?
.wav
.mp3
.mp4
.ogg
One factor that affects the quality of digital audio is the bit depth. What does this refer to?
The number of bits used to store each sample
The overall size of the sampled sound
The number of bits needed for 1 second of audio
The number of samples taken every second
Which of these are factors in determining the amount of storage needed for a digitally sampled sound? (select all that apply)
The number of samples taken per second
The bit depth per sample
The length of the sampled sound
The range of wave frequencies present in the sound
The type of audio sampled (voice, music, etc)
Which of these are factors in determining the quality of a sampled sound? (select all that apply)
The number of samples taken per second
The number of bits used to store each sample
The length of the sampled sound in seconds
The range of wave frequencies present in the sound
Which of these variables affect the file size of a sampled sound? (select all that apply)
the bit depth
the sampling frequency
the bit rate
the length of the sampled sound
the type of sound (speech, music etc)
What is the name of a popular freeware audio manipulation software?
Soundshop
Sonacity
Audacity
Wave Studio
