Assessment for Binary Unit

Below is a link to a test on Google forms which should allow you to complete the test.  Don't forget, you must write your email at the top so I can get the marks.

You can revise first!

Link to Google form for test


When you have done the test and submitted it, go to 10fastfingers.com and see how fast and accurately you can type.  Fast, accurate typing is useful and will certainly be increasingly useful as you progress through to higher education and employment

Lesson 5 - Using binary for sound

Sound is a wave form that travels through the air, vibrating molecules as it goes.  It's the vibrating molecules hitting our eardrum that our brain interprets as sound.  The height of the sound wave (amplitude) determines the noise level (volume) and the number of crests and troughs (ups and downs) of the wave in a second (frequency) determines the pitch of the sound.

Sound as a wave form is called analogue sound.  We have to 'digitise' the sound (turn it into binary) to be able to record it, play it back and edit it.

Objectives and Outcomes

• Understand how analogue sound is created.
• Understand that analogue sound has to be converted to digital sound in order to be recorded, played back and edited.
• Be able to explain that sound is represented by binary numbers in a computer.
• Understand the process of sampling.
• Be able to explain that maths can be used to digital process sounds to alter their quality.

Your Tasks

1.  Go to the link below and read through the information.

Link to slide show about digital sound

2.  Open a new blog post, titled the same as this one.

3.  In your own words, explain how sound is changed so it can be stored on a computer system.

4.  In your own words, explain how special effects can be made, eg the voice of the Daleks.

5.  Go to this link on BBC Bitesize and read through all 4 'pages'.
Link to BBC Bitesize

6.  Think you have remembered everything you have read? Then, in your own words, explain what 'sample rate' means.

7.  From your reading of the Bitesize information, explain, in your own words, what 'compression' is and why we need it.

8.  Explain what the 2 types of compression are and their differences.

9.  Go to this link and do the test.... Test!    Write your score on your blog post.
Publish your post!!!