Music and the Making of Modern Science
212 Chapter 13 A B C Figure 13.12 Drawings from Faraday ’ s diary: (a) Modes of vibration excited on a circular plate barely cov ...
Hearing the Field 213 it vanished in the steady state and only appeared the instant contact was made or broken, and thus could e ...
214 Chapter 13 prospect of speaking without Faraday ’ s sympathetic ventriloquism. To fill the evening after Wheatstone ’ s flig ...
Hearing the Field 215 also masses of matter together. ” Faraday wanted “ to dismiss the aether, but not the vibra- tion. ” His n ...
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In the decades after 1850, Hermann von Helmholtz undertook extensive investigations into the nature of vision and hearing that r ...
218 Chapter 14 devices helped him develop a “ sign theory ” that associated each such movement and its muscular state with the a ...
Helmholtz and the Sirens 219 Figure 14.2 Helmholtz ’ s tachistoscope, used to avoid involuntary movement of the eye by very brie ...
220 Chapter 14 Figure 14.3 Helmholtz ’ s opthalmotrope, a model used to study basic mechanisms of eye movements (built in 1857 b ...
Helmholtz and the Sirens 221 Figure 14.4 (a) Helmholtz ’ s representations (from his Handbook of Physiological Optics , 1866) of ...
222 Chapter 14 Helmholtz ’ s spectral diagram ( figure 14.5a ) shows only about nine semitones (hence slightly more than a major ...
Helmholtz and the Sirens 223 confines of European practice in order to study the cultural determination of hearing. The whole pr ...
224 Chapter 14 Figure 14.5 (a) Helmholtz ’ s plate from his Handbook of Physiological Optics (Part II, 1860) showing the solar s ...
Helmholtz and the Sirens 225 A B Figure 14.7 Helmholtz ’ s illustration of the visual trace made by the motion of a tuning fork, ...
226 Chapter 14 “ equal intervals of time, ” audible as pure tones. Thus, Helmholtz uses the siren to map visible hole spacings i ...
Helmholtz and the Sirens 227 Using the double siren, Helmholtz could produce other varieties of “ intermittent ” or “ beat tones ...
228 Chapter 14 The ear is greatly superior in this respect to any other nervous apparatus. It is eminently the organ for small i ...
Helmholtz and the Sirens 229 the eye; he must make use of the prism to decompose the light for him. ”^27 Unaided hearing, then, ...
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Already in 1862, in the midst of his detailed investigations of vision and hearing, Helm- holtz became interested in the more ge ...
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