High Quality Content by WIKIPEDIA articles! Animals with the ability to localize sound have a clear evolutionary advantage. This is achieved in the mammalian brain by integrating phase, frequency, amplitude and direction information contained within the sound signals. This information, combined with cues from other sensory modalities, facilitates localization of the source. While auditory localization in the horizontal plane (azimuth) requires binaural (ITD and ILD) differences, localizing elevation (zenith) is dependent on just ear. Given that both ears on the interaural axis are located at the same height, changes in elevation produce no interaural time or intensity differences between the left and right ears. Here we discuss some of nature's evolutionary solutions to the problem of vertical localization, ranging from the simple, extra-cortical technique of tilting one's head, to the neural correlates of spectral analysis within the brain. Данное издание представляет собой...

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