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Learning objective

Grasp how and why computers represent sound, focusing on the impact of sample rate and sample resolution. Notes: • Sound waves are sampled to convert sound into binary for computer processing. • Sample rate refers to the number of samples taken per second. • Sample resolution indicates the number of bits per sample. • Higher sample rates and resolutions lead to better recording accuracy and larger file sizes.

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  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE Computer ScienceData representation

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Quick explanation

Grasp how and why computers represent sound, focusing on the impact of sample rate and sample resolution. Notes: • Sound waves are sampled to convert sound into binary for computer processing. • Sample rate refers to the number of samples taken per second. • Sample resolution indicates the number of bits per sample. • Higher sample rates and resolutions lead to better recording accuracy and larger file sizes

  • This point belongs to Text, sound and images, especially Text, sound and images outcomes.
  • You need to be able to grasp how and why computers represent sound, focusing on the impact of sample rate and sample resolution. Notes: • Sound waves are sampled to convert sound into binary for computer processing. • Sample rate refers to the number of samples taken per second. • Sample resolution indicates the number of bits per sample. • Higher sample rates and resolutions lead to better recording accuracy and larger file sizes.
  • The key ideas to know are Understand, Explain, and Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

UnderstandExplainDescribe

Why it matters

This objective helps connect Text, sound and images outcomes to exam-style questions, flashcards, and revision notes for Text, sound and images.

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Paper 1 structured question: Text, sound and images

Paper 1Computer Systems1 marks

Description

Sound Representation

Sound is digitized by sampling sound waves at specific intervals, converting them into binary data. The sample rate is the number of samples taken per second, while sample resolution is the number of bits used for each sample. Higher values in both lead to better sound quality but larger file sizes.

  1. a

    State What does sample rate refer to?

    Aim for approximately 1 distinct marking point.

    [1]
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