Converting from Sound to Analogue

QuizÂ by GCSE Computer Science Teacher 2

GCSE (AQA)
Computer Science
English National Curriculum

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### Measures 1 skill fromGCSE (AQA)Computer ScienceEnglish National Curriculum

3.3.7.a

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12 questions
• Q1
Audio to digital compression
Analogue to digital compression
Analogue to digital converter
Album to digital converter
30s
3.3.7.a
• Q2
What is the outcome of the ADC process?
Analogue is compressed to smaller file formats
Audio sounds are converted to analogue
Soundwaves are represented in binary (digital)
Digital sound is represented in analogue
30s
3.3.7.a
• Q3
Why must analogue sound be converted to digital?
So that computers can understand it in a binary format
Because its easier for humans to understand
To have a digital copy of the sounds
So that it takes up less computer storage
30s
3.3.7.a
• Q4
What is the sample rate?
The frequency with which the sound changes in an audio recording
The number of recordings you have of the same sound
The size of the total audio sample
The frequency with which you record the amplitude of the sound
30s
3.3.7.a
• Q5
What is the sample resolution?
The number of bits used to store each sample
The frequency of the samples taken per second
The range of rounds recorded
The volume of the sound recorded
30s
3.3.7.a
• Q6
What is the Amplitude?
The loudest sound recorded in a sample
The maximum height of sound wave from the middle of the wave to its peak or trough
The frequency with which you record the amplitude of the sound
The number of bits used to store each sample
30s
3.3.7.a
• Q7
What is Hertz in relation to sound conversion?
The number of different high pitched sounds recorded
The unit of frequency used to measure how many sound waves per second
The speed at which the conversation can be processed
The number of bits used to stored each sample
30s
3.3.7.a
• Q8
What is the common audio sample rate for music?
44,100 Hertz
32,000 Hertz
40 Khz
8 Khz
30s
3.3.7.a
• Q9
What is the bit depth normally found on a CD?
8 bits
16 bits
32 bits
64 bits
30s
3.3.7.a
• Q10
What is the bit depth normally found on a DVD?
24 bits
8 bits
32 bits
16 bits
30s
3.3.7.a
• Q11
What is the maximum resolution of a recording with a bit depth of 16?
65, 536
255
44,100
100,000
30s
3.3.7.a
• Q12
What happens is an audio file is compressed after conversion?
The length of the recording in shorted, removing any silent parts
The file sizes increases to match the maximum resolution
The sample rate is reduced, reducing the resolution and file size
The sample rate in increased, increasing the resolution and file size
30s
3.3.7.a

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