1. Understand sound waves and the physical measures of frequency (Hertz) and amplitude (decibel). What does it mean to go from 100 Hz to 200 Hz? What does 0 dB SPL mean? What does it mean to go from 0 dB to 40 dB SPL?

2. Understand describing sound waves as sine waves. In what sense is this description accurate and inaccurate? What happens when sound waves combine?

3. Terminology is important. Know the difference between pitch and frequency, loudness and amplitude. If you know the frequency, can you predict the pitch? If you know the amplitude, can you predict loudness?

4. Know the structure of the ear. Be able to follow the sequence from a sound wave hitting the pinna to the bending of a hair cell. Understand the different functions of the Inner Hair Cells and the Outer Hair Cells.

5. Consider the cases of a 50 Hz and a 5000 Hz sound signal. Know how these signals affect the basilar membrane and produce different pitch experiences according to the Rutherford/Wever frequency/volley explanation and the place explanations of Helmholtz and Von Bekesy.

6. What is a click-induced (evoked) otoacoustic emission? How does this happen? What is a spontaneous otoacoustic emission? What do these spontaneous otoacoustic emissions tell us about the basilar membrane?

7. What are the two types of hearing loss? How does an audiogram differentiate between the two types? What type of hearing loss is presbycusis?

8. What is an audibility function? How is it produced? Know the general shape of the function. What does this tell us about the relationship between amplitude and loudness?

9. What are an equal loudness contours? What does they tell us about the relationship between amplitude and loudness?

10. What is the amplitude-frequency shift? Know the general shapes of these contours for different frequencies. Functionally, what do these contours tell us about the relationship between frequency and pitch?

11. What were Steven's scales of loudness and pitch? How were they created? Why aren't they in general use?

12. Understand the azimuth system for indicating direction.

13. Know how interaural intensity differences contribute to localization of sounds. Does this cue work with all frequencies?

14. Know how interaural time differences contribute to localization of sounds. Does this cue work with all frequencies?

15. The duplex theory of sound localization was tested in an experiment by Stevens and Newman. What were the results? What do the results suggest for human hearing?

16. What is "visual capture"? How does ventriloquism work? Can a person really "throw his voice"?

17. What is the cone of confusion? Why do we have difficulty discriminating between a sound located at 0 and at 180 degrees? Explain why moving your head makes localizing a sound easier.

And don't forget that we began the section with Gestalt Psychology.

18. What is a "Gestalt"? What do we do when looking at a scene, according to Gestalt psychologists?

19. What are the Gestalt grouping principles and how do they operate? What is a problem with the Gestalt psychology approach to analysis of a "Gestalt"?