Psychology 3203
Questions about Hearing to Ponder before Test 4
1. Be able to diagram and label 1 cycle of a sinusoid. Use the diagram to explain the physical measures of frequency, amplitude, and phase angle.
2. Be able to diagram/explain the sequence from a pressure wave entering the auditory canal to the bending of a hair cell.
3. Consider the case of a 500 Hz sound signal. Be able to describe, compare, and contrast how this signal is transmitted at the basilar membrane according to a frequency/volley explanation and a place explanation.
4. What is Ohm’s acoustical law? Describe a concrete example using a piano keyboard. What does this law suggest about how hearing works?
5. What is an otoacoustic emission? How does this happen? What do otoacoustic emissions tell us about the basilar membrane?
6. What is a sone? a mel? a Mel Torme? Was the mel named after Mel? Why don't we hear much about the first two terms?
7. Be able to describe/draw an equal loudness contour and an equal pitch contour. Functionally, what do these contours tell us about hearing?
8. Define and explain the duplex theory of sound localization. Be able to illustrate the theory by use of a diagram.
9. Explain when and why someone would have difficulty discriminating between a sound located at 0 and at 180 degrees. Explain why moving your head makes localizing a sound easier.
10. Describe the Stevens and Newman experiment. What do the results suggest for human hearing?
11. What is the "cone of confusion"?
12. What is "visual capture"?
13. Be able to draw, describe, and explain why Shepard would decribe our psychological scale of pitch as a helix.
14. Describe the ordinary case for a person identifying a piano note. What makes a "Shepard note" so tricky? How does the construction of the notes explain Shepard's scale illusion?