Sound and Hearing

2. What type of waves are sound waves?
3. What causes seismic waves?
4. What do we call sounds which have a frequency higher than the upper hearing range of humans (20kHz)?
7. The three small bones in the ear are called the hammer, anvil and .......
8. If we increase this on a sound wave, the pitch gets higher.
11. This word describes anything which repeatedly moves backwards and forwards or up and down.
13. In a longitudinal wave, what are the areas of lower pressure called?
14. Where does the auditory nerve transmit electrical signals to?
15. This is the distance between two consecutive similar points on a wave. For example, the distance between two peaks.
17. What type of waves are light, microwaves, ultra-violet and water waves?

1. These cause sound waves.
5. If we increase this on a sound wave, the sound gets louder.
6. What are the units for measuring frequency?
9. In a longitudinal wave, what are the areas of higher pressure called?
10. What job do the semi-circular canals do for us?
12. This part of the ear turns vibrations into electrical signals.
16. This part of the ear is at the end of the ear canal and picks up the vibrations.