Representing sound
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Lesson details
Key learning points
- In this lesson, we will look at sound and think about how it could be represented for storage or transmission. We will investigate the effect of sound waves in the air and how this relates to speakers and microphones. We will sample a short sound wave in order to understand this representation and how it can be improved on. We will also calculate representation size from sample rate, size, and duration.
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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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3 Questions
Q1.
Amplitude is... (select two)
The frequency of samples
The tone of the sound
Q2.
Sample rate is measured in...
Amplitude
bits
Pitch
Q3.
Calculate the file size in bits for a 2 minute sound recording that has used a sample rate of 1000 Hertz and a sample resolution of 5 bits.
1,200,000
10,000
600