Sound and Acoustics

What this page covers

This unit collects resources on how sound is made and how it travels. Many start with the basics: sound is caused by vibrations, it needs a medium, and loud sounds come from large amplitude vibrations. Others go further, into the decibel scale, resonance, ultrasound, acoustics and the ear. One flashcard deck, Physics Formulas, lists terms such as period, frequency, intensity and wavelength.

Where to start

Begin with the Sound Quiz. It asks what causes sound and how intensity relates to amplitude, so it shows quickly what you already know. Then open the Sound mind map, which links vibrations to amplitude, frequency and pitch. If you want definitions, the deck 5.3 sound energy asks what sound energy, an echo, pitch and frequency are.

Using quizzes and maps together

Work in a loop. Take a quiz, note the questions you missed, and find the matching branch on a mind map. Then test yourself with flashcards on that branch. Notes such as Light & Sound Summary help when you need a full explanation of how sound is generated and travels through air.

1. Take a quiz such as Sound Waves.
2. Review the related mind map branch.
3. Practice the terms with a flashcard deck.
4. Retake the quiz.

Going further

Once the basics feel secure, try the Doppler effect set. It has flashcards for a source approaching, a source moving away and a moving observer, plus worked example notes and The Doppler Effect quiz. The Ultrasound mind map covers high frequency sound above the range of human hearing. Mixed review quizzes such as Waves and Sound Exam Review suit the end of your studying.

Where it fits

This unit sits in the strand Waves, Sound and Light, within Physics. Several resources also cover light, so you can connect the two topics. Choose one resource and begin, then add your own maps and flashcards as you go.