Sound Waves & Acoustics
📋 What it is
Acoustics is the science of how sound behaves in spaces — echoes, absorption and clarity.
🗣️ Coach says
Acoustics studies how sound acts in a room or hall. Hard surfaces reflect sound (echoey gym); soft surfaces absorb it (quiet carpeted room). Concert halls are shaped and lined on purpose so every seat hears clearly — engineering sound with reflection and absorption.
🧠 Memory hook
Hard surfaces reflect (echoey) · soft surfaces absorb (quiet). Acoustics = shaping sound in a space.
😂 Giggle
What did the reflection say to the mirror?
"I see where you're coming from — and it's ME!"
😲 Whoa!
Some whispering galleries are shaped so a whisper on one side travels along the curved wall and can be heard clearly 30 metres away on the other side.
✅ Quick check: Why is a carpeted, curtained room quieter than an empty tiled one?
Say your answer out loud first — then reveal.
Soft materials absorb sound waves, while hard bare surfaces reflect them and create echo.
Absorption reduces reflection, lowering echo and noise.
🧪 Try it! (2 minutes)
Clap once in a tiled bathroom, then in a carpeted room — hear reflection vs absorption.