1. Sound Waves
(9.2)

2. See the vibrating string producing sound waves

3. Sound travels as longitudinal waves

4. Whale songs in water medium

5. Sound waves travel in all directions

6. Sonar in bats for finding food at night (receiving echos)

7. Sonar for water

8. Volume “loudness”

9. Decibels

10. Pitch “Intensity”

11. Musical Instruments and pitch

12. Musical Instruments and pitch

13. Musical Instruments and pitch

14. Hearing (bending of hairs)

15. Coclea (fluid filled…perilymph) canal

16. Fluid ripple of perilymph bends the hairs in the middle using the tectorial membrane

17. Auditory nerve & brain to process sound waves into sound