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The avian head induces cues for sound localization in elevation.


ABSTRACT: Accurate sound source localization in three-dimensional space is essential for an animal's orientation and survival. While the horizontal position can be determined by interaural time and intensity differences, localization in elevation was thought to require external structures that modify sound before it reaches the tympanum. Here we show that in birds even without external structures like pinnae or feather ruffs, the simple shape of their head induces sound modifications that depend on the elevation of the source. Based on a model of localization errors, we show that these cues are sufficient to locate sounds in the vertical plane. These results suggest that the head of all birds induces acoustic cues for sound localization in the vertical plane, even in the absence of external ears.

SUBMITTER: Schnyder HA 

PROVIDER: S-EPMC4229125 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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The avian head induces cues for sound localization in elevation.

Schnyder Hans A HA   Vanderelst Dieter D   Bartenstein Sophia S   Firzlaff Uwe U   Luksch Harald H  

PloS one 20141112 11


Accurate sound source localization in three-dimensional space is essential for an animal's orientation and survival. While the horizontal position can be determined by interaural time and intensity differences, localization in elevation was thought to require external structures that modify sound before it reaches the tympanum. Here we show that in birds even without external structures like pinnae or feather ruffs, the simple shape of their head induces sound modifications that depend on the el  ...[more]

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