. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. HEARINa. 607 have a fundamental (self-tone, proper tone) tone of their own, to which they respond more readily than to others. If such held for the membrana tympani, it is evident that certain tones would be heard better than others, and that when the fundamental one was produced the result might be a sen- sation unpleasant from its intensity. This is partially obviated by the damping effect of the auditory ossicles, which also pre- vent after-vibr
. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. HEARINa. 607 have a fundamental (self-tone, proper tone) tone of their own, to which they respond more readily than to others. If such held for the membrana tympani, it is evident that certain tones would be heard better than others, and that when the fundamental one was produced the result might be a sen- sation unpleasant from its intensity. This is partially obviated by the damping effect of the auditory ossicles, which also pre- vent after-vibrations. Some suppose that what we denominate shrill or harsh sounds are, in part at least, owing to the auditory meatus hav- ing a corresponding fundamental note of its own. The Auditory Ossicles.—Though these small bones are con- nected by perfect joints, permitting a certain amount of play upon one another, experiment has shown that they vibrate in response to the movements of the drum-head en masse ; though. Fig. 447.—Section of auditory organ of horse (after Chauveau). A^ auditory canal; B, mem- brana tympani; C, malleus ; /), incus ; F^ stapes ; G, mastoid cells ; H, fenestra ovalis : /, vestibule ; J, iT, Z,, outline of semicircular canals ; 3/, cochlea ; iV, commencement of scala Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mills, Wesley, 1847-1915. New York, D. Appleton
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