# Sound Waves

Canonical: https://manyspace.aporia.systems/topics/sound-waves-phy-waves-031
Updated: 2026-10-13

Physics · Oscillations & Waves · PHY-WAVES-031

- Difficulty: 2 / 5
- Importance: 4 / 5
- Study time: 2.5–5 h

speed of sound, intensity, decibels, beats, Doppler effect

## Why it matters

One physical theme — oscillation and wave propagation — recurs in mechanics, EM, quantum mechanics and optics.

## Where it is used

Sound engineering, music, seismology, AC power, communications, MEMS oscillators, structural vibrations.

## How you know you have learned it

Solve ≥10 representative problems with ≥80% adjusted accuracy.

## What you need first

- [Position, Displacement & Velocity](https://manyspace.aporia.systems/topics/position-displacement-velocity-phy-mech1-010) (required)
- [Superposition & Interference](https://manyspace.aporia.systems/topics/superposition-interference-phy-waves-029) (required)
- [Basic Ratios](https://manyspace.aporia.systems/topics/basic-ratios-mth-trig-064) (helpful)
- [Intuitive Limits](https://manyspace.aporia.systems/topics/intuitive-limits-mth-calc1-123) (helpful)

## What it opens

- [Audio as Signal: Sampling and Waveforms](https://manyspace.aporia.systems/topics/audio-as-signal-sampling-and-waveforms-aiml-aud-001)

## Resources

- University Physics (Young & Freedman) — Young & Freedman
- Vibrations and Waves — A. P. French
- Vibrations and Waves — A. P. French