ACARA 7-8 Digital Technologies: Representing sound and pulling it together
Students learn how sound is sampled and stored as binary numbers, weigh quality against file size, and explain how text, images and sound all become integers and then binary.
One content description (AC9TDI8K03, AC9TDI8K04) from the full ACARA Digital Technologies Years 7–8 — Representing Text, Images and Sound journey. All 14 modules below are in that journey too, with the same content — add just these to a class, or the whole strand.
Modules (14)
1
Analogue sound waves and digital sound
2
Reading a sound waveform
3
How sound is turned into binary
4
A sample is one volume measurement
5
A sound as a sequence of numbers
6
Sample rate and audio quality
7
Hertz and kilohertz
8
Sample resolution
9
Number of volume levels from sample resolution
10
Bit rate of digital audio
11
Zooming in to see samples in an audio editor
12
Choosing settings: quality versus file size
13
Text, images and sound all become integers, then binary
14
Explaining data representation to a peer
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