# Representing sound

In this lesson, you will look at sound and think about how it could be represented for storage or transmission. You will investigate the effect of sound waves in the air and how this relates to speakers and microphones. You will sample a short sound wave in order to understand this representation and how it can be improved on. You will also calculate representation size from sample rate, size, and duration.

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# 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.

Quiz:

# Representing Sound

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

## Question 3

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

Quiz:

# Representing Sound

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

## Question 3

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

### Time to move!

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Dance

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