O Level Physics · Topic hub
Sound
O Level Physics sound hub: production and propagation, loudness and pitch, speed of sound, echoes, and ultrasound.
Before you begin
Follow the lesson route in order when the topic is new. If you are revising, begin with the topic check and return to the lesson it identifies.
Be comfortable with: What Is Wave
How the ideas connect
- Vibrating sources
- Longitudinal waves
- Pitch and loudness
- Echoes and ultrasound
Learn in order
Lesson route
Basics & Properties
Calculations & Applications
Prove your understanding
Practice and repair
Key ideas and reference
Use this concise Sound checklist for orientation. Open a linked lesson for definitions, derivations, diagrams and worked examples.
- How vibrations create longitudinal waves.
- Measuring speed and calculating distances with echoes.
- Using high-frequency sound in medicine and industry.
Course coverage and review details
This route covers: Explain sound production, its longitudinal propagation and need for a medium. Relate loudness to amplitude and pitch to frequency. Explain echoes, distance measurement and ultrasound applications.
Use the course context above when choosing qualification-specific practice and evidence.
Reviewed Jul 19, 2026
Frequently asked questions
Who should use this sound hub?
Use this if you are revising O Level waves and want clear links between wave quantities and what exam questions call loudness, pitch, echo, and ultrasound.
What should I revise first before sound calculations?
Revise wave equation basics and propagation language first so v=fλ and echo timing methods feel automatic in questions.
What exam traps are common for sound?
Frequent mistakes are forgetting round-trip distance in echo questions, mixing amplitude with frequency, and claiming sound travels in vacuum.
What should I do after this hub?
Do waves quiz + structured practice, then continue to light/EM sections so mixed-topic paper practice becomes easier.