Do it now activity

1. Do it now activity Last lesson we learnt about how images are stored on a computer.Can a computer decide what colours to use in an image? How does a computer know what colours to use?

2. Learning objectives Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could affect efficiency

3. Learning outcomes By the end of this lesson you will be able to ....

4. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could affect efficiency New Learning Learning objectives What is sound? Find a picture to represent sound on the eardrum Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

5. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could affect efficiency New Learning Learning objectives Amplitude and Frequency Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

6. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could affect efficiency New Learning Learning objectives Amplitude is how loud the sound is Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

7. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could effect efficiency New Learning Learning objectives Frequency is how often the sound is measured This is measured in Hertz (Hz for short) Frequency is also called pitch Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

8. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could effect efficiency New Learning Learning objectives Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

9. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could effect efficiency Learning objectives Talk Task On your whiteboards Is the sound quiet or loud? Is the sound low or high pitched? Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

10. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could effect efficiency Independent Task Learning objectives Computers use sampling to re-create sounds Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

11. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could effect efficiency Learning Development Learning objectives Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

12. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could effect efficiency Independent Task Learning objectives Access on Weebly Term 3 - Lesson 4 Complete the independent task based on the level you are working towards Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

13. Recognise how sound is represented in a computer system Investigate how computers use metadata to re-create sound Investigate how an increased sample rate could effect efficiency Plenary Learning objectives How is sampling a sound the same as digitising an image? Amplitude Frequency Megahertz SoundAnalogueDigitising Sampling Pitch Binary

14. Learning outcomes By the end of this lesson you will be able to ....