# A student uses a microphone connected to an oscilloscope to display two different sound waves, Wave A and Wave B. Wave A has a large amplitude and a low frequency. Wave B has a small amplitude and a high frequency. Describe how the loudness and pitch of Wave A compare with those of Wave B.

> Pearson Edexcel International GCSE Physics (4PH1) — 3.3 Light and sound · Describe · 4 marks

> A student investigates two sound waves using a microphone and an oscilloscope. Wave A has a large amplitude and a low frequency. Wave B has a small amplitude and a high frequency.

## Mark scheme (4 marks)

1. Wave A is louder than Wave B
2. Because Wave A has a greater / larger amplitude (than Wave B)
3. Wave A has a lower pitch than Wave B
4. Because Wave A has a lower frequency (than Wave B) / the greater the frequency, the higher the pitch

## Key terms

- [amplitude](https://www.gradenine.co.uk/glossary/amplitude)
- [frequency](https://www.gradenine.co.uk/glossary/frequency)
- [loudness](https://www.gradenine.co.uk/glossary/loudness)
- [pitch](https://www.gradenine.co.uk/glossary/pitch)
- [oscilloscope](https://www.gradenine.co.uk/glossary/oscilloscope)
- [microphone](https://www.gradenine.co.uk/glossary/microphone)

## Related

- [Revision notes for Pearson Edexcel International GCSE Physics (4PH1)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/a-student-uses-a-microphone-connected-064744d4) · Published by Druglandscape Ltd.