source file: mills2.txt Date: Sun, 15 Oct 1995 07:59:42 -0700 From: "John H. Chalmers" From: mclaren Subject: Tuning and psychoacoustics - post 21 of 25 --- Throughout this series of posts, we have seen that the ear/brain system is not simple. Tones," in "The Psychology of Music," ed. Diana Deutsch, 1982, pg. 21] But the behavior of the ear/brain system is also different from that predicted by Seebeck, Stumpf and Schouten: e away the fundamental 440 cps and the second harmonic 880 cps? l. 1, No.1, 1955, pg. 55 (English edition, 1957)] This is the simplest and most compelling example of the contradictory behavior of the ear/brain system. s. (...) The fundamental neural message is given by the rate and the distribution in time with which individual impulses are fired along the axon." [Roederer, Juan, "The Physics and Psychophysics of Music," 1973, pg. 45] des the information on repetition rate or periodicity pitch (see below)." [Roederer, Juan, "The Physics and Psychophysics of Music," 1973, pg. 45] main and the Seebeck/Stumpf time-domain model of the ear, and instead supports the Fetis/Burns/Ward model of the ear as an adaptive system molded by learned responses. Thus in one simple experiment we have compelling evidence both for and against all 3 major theories of hearing. Other compelling evidence for the "contextual" behaviour of the ear/brain system abounds. influencing is effected by the following vowel (regressive dissimilation) as well as by the preceding." [Werner Meyer-Eppler, "Statistic and Psychologic Problems of Sound," Die Reihe, Vol. 1, No.1, 1955, pg. 55 (English edition, 1957)] and Synthesis," in "The Psychology of Music," ed. Diana Deutsch, 1982, pg. 36] 429.] 1, pg. 429.] greater than 2 milliseconds." [Pierce, J.R., "The Science of Musical Sound," 2nd ed., 1992, pg. 149] "On the hypothesis that critical band filters can be identified with auditory nerve filters, the model of Zwicker and Scharf was tested by Pickles (1983). (...) The results agreed with the psychophysical darta, in that the summed activity increased with stimulus bandwidth, for wider timulus bandwidths. (Fig. 9.13 B). However, there was no clear sign of a flat portion in the function at narrow bandwidths. The reason for this is not known..." [Pickles, James O., "An Introduction to the Physiology of Hearing," Academic Press, 2nd ed., 1988, pg. 283] . he listener is based on learned experience..." [Roderer, Juan, "The Physics and Psychophysics of Music," 1973, pg. 134] But by far the most striking gaps in current knowledge of the ear/brain system involve the question of how the human auditory performs 3-dimensional sound localization. TF, or the location of a specific sound using that mathematically-modelled HRTF. Human Subjects," J. Audio Eng. Soc., 43(5), 1995 May, pp. 300-321; also see Appleton, J., "Machine Songs III: Music In the Service of Science-- Science in the Service of Music," Computer Music Journal, 16(3), 1992, pp. 17-21] Clearly, there remain many unexplained aspects in the behavior of the ear/brain system. The next post examines the mass of evidence gleaned from the many psychoacoustics results confirmed and supported by a wealth of modern. Although the modern psychoacoustic data is complex, it does support some conclusions. These will be given in the next post, after which the various biases and prejudices of the psychoacoustic researchers themselves will be examined...with an eye to determining how much or how little their prejudices affected the conclusions each major researcher drew from hi/r research. --mclaren Received: from eartha.mills.edu [144.91.3.20] by vbv40.ezh.nl with SMTP-OpenVMS via TCP/IP; Sun, 15 Oct 1995 19:43 +0100 Received: from by eartha.mills.edu via SMTP (940816.SGI.8.6.9/930416.SGI) for id KAA28157; Sun, 15 Oct 1995 10:42:44 -0700 Date: Sun, 15 Oct 1995 10:42:44 -0700 Message-Id: <951015174059_71670.2576_HHB28-1@CompuServe.COM> Errors-To: madole@ella.mills.edu Reply-To: tuning@eartha.mills.edu Originator: tuning@eartha.mills.edu Sender: tuning@eartha.mills.edu