((Sound Waves))

((Sound Waves))

1. Longitudinal

2. Produced by vibrating objects

3. Sound waves require a medium to pass on the vibrations

4. They travel at about 300m/s in the air.

   • About 1500m/s in liquids.
     • And up to 5000m/s in solids

5. Can be reflected from hard surfaces.

   • The reflected waves are called Echoes
   • They refracted when they travel into a different medium.

6. We can use an oscilloscope to display sound waves

   • Displays a transverse representation of a longitudinal wave.

7. The loudness of a sound depends on its amplitude.