Keolian's physical demonstration of the Basilar membrane (place theory of hearing) скачать в хорошем качестве

Keolian's physical demonstration of the Basilar membrane (place theory of hearing)

In this video (no audio track yet), I'm showing an apparatus designed and built by Robert Keolian, an acoustician who designs fabulous demonstration apparatus to illustrate complicated acoustical phenomenal. This mechanical apparatus is a physical demonstration of the basilar membrane in the cochlea -- based on the model proposed by von Békésy to describe the propagation of waves on the basilar membrane. This is sometimes called the "place theory of hearing" -- the basilar membrane is thick and stiff near the oval window (where high frequencies maximally excite the basilar membrane hair cells) and wide and flexible at the far end (where low frequencies have maximal amplitude). The description of this physical demonstration apparatus and the theory behind it may be found in: Robert M. Keolian, "A demonstration apparatus of the cochlea," J. Acoust. Soc. Am., 101, 1199–1201 (1997). https://doi.org/10.1121/1.419497 0:00 normal speed 0:45 again but in slow motion (120fps) 4:38 slow motion and zoomed in to see better