1. Sound Waves Longitudinal Pitch = frequency
Intensity = amplitude (loudness)
Echo = reflection
Sound Requires medium (wont travel in space)

2. Speed of Sound Speed of sound slower than light speed
Speed determined by medium & Temp
Air slowest……Water medium….steel fast
Sound at warm temp. faster

3. Ultrasound Higher frequency than humans can hear 20,000 hz
Used for echocardiograms (view heart)
Used for echolocation by bats & dolphins
Used for ultrasounds to see unborn babies

4. More dense substances reflect sound best = bright

5. Sonar
SOund Navigation And Ranging
D = ½ time x speed of sound