Sound
Lesson Instructions
Watch and follow the YouTube video, the lesson contains three parts:
Key Information and content - all you need to do here is watch and listen
Learning activity - this activity involves answering different questions about sound
Consolidation - these are past exam question and are for deliberate practice to check your understanding.
Sound Full Lesson Video.mp4Task - Analog to Digital Sound
Task - Exam Questions - Deliberate Practice
Mark Scheme
Question 1 (i)
The height/amplitude of the sound wave is measured...
... at regular intervals
... and converted to binary,
Question 1 (ii)
If the interval is smaller/if you sample more often you have more data to store...
... so the file is larger
but the sound reproduced is closer to the original
... so better quality.
Question 2 (i)
The amplitude/height of a wave is measured
At set intervals
And stored as a binary number
The samples form an approximated sound wave
Question 2 (ii)
The file size increases
So the sound us better quality/more accurate compared to the original.