Sonic playground

In this lesson, we will revisit the digitisation process, in order to understand how the sampling rate and the sample size affect the size and quality of the representation. We will also use a sound editing program.

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.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

Sonic Playground

Helps you to assess your understanding of representation size of audio files .

Q1.Samples taken in a second is called .................................

1/5

Q2.Number of bits in each sample is called ..............

2/5

Q3.An advantage of taking samples for every 5 minutes, instead of every 10 minutes is .................................

3/5

Q4.One of the disadvantage of taking samples for every 5 minutes, instead of every 10 minutes is .................................

4/5

Q5.Assume that you have a digital recording of a sound. The duration is 2 seconds. The sampling rate is 4,000 samples per second. The sample size is 2 bytes per sample. Use this information to compute the number of bytes required to represent this sound. You may need to use a calculator for this task.

5/5

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

Sonic Playground

Helps you to assess your understanding of representation size of audio files .

Q1.Samples taken in a second is called .................................

1/5

Q2.Number of bits in each sample is called ..............

2/5

Q3.An advantage of taking samples for every 5 minutes, instead of every 10 minutes is .................................

3/5

Q4.One of the disadvantage of taking samples for every 5 minutes, instead of every 10 minutes is .................................

4/5

Q5.Assume that you have a digital recording of a sound. The duration is 2 seconds. The sampling rate is 4,000 samples per second. The sample size is 2 bytes per sample. Use this information to compute the number of bytes required to represent this sound. You may need to use a calculator for this task.

5/5

Lesson summary: Sonic playground

Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance