Representing sound

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.

Video

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Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Representing Sound

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Amplitude is... (select two)

Select two (2) boxes

1/3

Q2.Sample rate is measured in...

2/3

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.

3/3

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Representing Sound

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Amplitude is... (select two)

Select two (2) boxes

1/3

Q2.Sample rate is measured in...

2/3

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.

3/3

Lesson summary: Representing sound

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