I. THE NATURE OF BINAURAL HEARING
Binocular vision gives a perception of distance through the coördination in the brain of sensations coming from the two retinas and the two sets of ocular muscles. In a somewhat comparable way, one determines whether a sound comes from the right or left side by the coordination of sensations coming from the ears. In other words, the lateral localization of sound1 is a result of binaural hearing.A clear understanding of two terms is essential for following a discussion of the subject, and these terms will be briefly explained. In figure 1, D represents the head of a listener seen from above. R and L are his right and left ears. B is the position of a sound. The segments of concentric circles represent sound waves.The listener, D, knows that the sound is on his right side, for two reasons. In the
GREENE TC. THE ABILITY TO LOCALIZE SOUND: A STUDY OF BINAURAL HEARING IN PATIENTS WITH TUMOR OF THE BRAIN. Arch Surg. 1929;18(4):1825–1841. doi:10.1001/archsurg.1929.01140130927061
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