That's why they're called "mechanical waves." Examples in Everyday Life. Whispering Secrets: When you whisper a secret to your friend, you're sending sound waves into their ears through the air.

Mechanical Waves. Mechanical waves require a medium (solid, liquid, or gas) to travel through. ... For example, sound waves in air, where compressions (high-pressure regions) ...

Engines use an opposite process: a temperature gradient provided by waste heat leads to mechanical vibrations. Solid state thermoacoustics initially seemed unlikely, since solids are somewhat more ...