音の方向知覺に關する研究

緒言

　聽覺には方向性の要素がある．此方向知覺に關する幾多の業績及び假説に就て再吟味をしてゆくと，其等假説と實驗との間には幾多の矛盾が内在してゐることが理論的並に實驗的に見出され，更に溯つて方向の定義其自體も亦批判を要するものなることを知つた．余等はかくして各假説の根本的矛盾を指摘すると共に，新しき實驗結果に基き幾つかの假説を作り更に今後探究の手段に資せんとする者である．

The author qsuestions the validity of establish-ed time-difference Theoryi and propose a new concept which is calld a three dimensional sub-jective, auditory localizalton of sound. They further compare the graphsablained by this me-thod with continuous ascent of tone on the one hand and wiht these of sight, hearling, tactsen-sation, monolateral hearing, and bilateral hear-ing more over, as the axis of the cochleas are situated at an angle of 90 degree with leach other, whose virtual Vertex is pointed posteriors and si-ighte belou the horizontal plane, and the basilar membrantn form a spiral, these anatonmical pa-rliculars are suggestive of relations to the curve of subjcthoe auditory localizatoin of souud.

It is stated, that, by observations on discassed cases, subjective aditory direction appeared to be dependent upon function of cerebral centers, of which the innerear also play a goodly part; but, external and midsille ear are not concerned wi-th it at all.