Sound

Lesson Instructions

Watch and follow the YouTube video, the lesson contains three parts:

  1. Key Information and content - all you need to do here is watch and listen

  2. Learning activity - this activity involves answering different questions about sound

  3. Consolidation - these are past exam question and are for deliberate practice to check your understanding.

Task - Analog to Digital Sound

Analog to Digital Sound Task

Task - Exam Questions - Deliberate Practice

Exam Questions - Print

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.