Open book examination to be completed and returned by 3:00 9.m. on Friday, March 20, 1992. You may use any available references or your notes, but do not consult with other students or staff regarding questions or answers.
1. We have found that transducers can be classified into 16 types according to their membership in four binary groups: 1) biological or technological, 2) efferent or afferent, 3) active or passive, 4) transductive or transponsive.
Provide a good example of each type, explain briefly how it operates and how it fits into its classified type.
2. Describe your strength-duration experiment and summarize your results indicating the chronaxie value you found and whether the “hyperbolic” constant strength-duration product showed up. Offer your comments on this very frequently found pattern, including your understanding of accommodation'' which is different from “acclimatization”.
3. Turn in your list of 7 to 10 “Universal Principles”, if you have not already done so, with a brief commentary on where this kind of creative effort or literature search might lead.
4. Turn in your report on the published article that you found especially interesting, giving the source reference and your evaluative critique of it. We ran out of class time to have each of you make this presentation orally. Perhaps we can do it in spring quarter. At least two of you have indicated a desire to use one of my video or audio tape documents, to which I have no objection.
5. You have seen the remarkably good demonstrations of the ability of a person with good hearing, to point, with eyes closed, to the source of sound made by clicking two coins together, whether ahead, behind, above or to one or the other side with accuracy of roughly ±50, or about 0.1 radians. Knowing the speed of sound (about 331 m/sec) and the distance between ear apertures (roughly 6 inches or 15 cm) , calculate the difference in time of arrival of sound at the two ears, that must be sensed, and speculate how this can be done with available biological transducers and processors, and then speculate on how the subject can distinguish between a click above, behind and in front along a path from which the distance to each ear remains constant.
6. Write the ideal final exam question for this quarter's Biophysics class, and then answer your question elegantly.