A source vibrates
Moving objects disturb nearby material and launch a wave.
Frequency relates to pitch
Higher-frequency sounds are generally perceived as higher pitch.
Amplitude relates to wave strength
Larger pressure variations correspond to greater sound intensity.
The medium matters
Sound speed and behaviour differ in gases, liquids and solids.
This page explains scientific concepts for general learning. It does not replace laboratory safety procedures, professional engineering guidance, or individualized medical advice.