What+do+sound+waves+do?

Reflection - bouncing back of waves
Examples: echoes, sonar, echolocation media type="file" key="echo.wav" width="300" height="50" Brittany shouted then her voice echoed.

Refraction - waves moving from one medium to another
Examples: sound in water, in the ground media type="file" key="Refraction.mov" width="300" height="300"

Mr. Smith's footstep traveled faster through the ground so in order to hear it Matt had listen to the ground.

Resonance - receiving a vibration at natural frequency causing it to increase in amplitude
Examples: Though not proven, it is speculated that resonance occurs when babies cry media type="file" key="Resonance.mov" width="300" height="300" One tuning fork was struck and then muted, but having the same frequency the other tuning fork started vibrating.

Diffraction - ability of a wave to go around obstacles or through openings
Examples: yelling in a room and hearing it in the hallway media type="file" key="Diffraction.mov" width="300" height="300" Even with the folder in between Tierra was still able to hear Brittany. The property of diffraction allows this to happen.

Interference - two or more waves occupying the same point in the medium at the same time causing addition or subtraction of amplitude
Examples:

Doppler Effect – change in frequency due to relative motion
Examples: car zooming by, jet plane media type="file" key="Doppler.mov" width="300" height="300" As the car got closer the noise got louder, because the sound waves were heard closer together.