Animals and ICE: meaning, origin, and diversity.

Abstract:

:ICE stands for internally coupled ears. More than half of the terrestrial vertebrates, such as frogs, lizards, and birds, as well as many insects, are equipped with ICE that utilize an air-filled cavity connecting the two eardrums. Its effect is pronounced and twofold. On the basis of a solid experimental and mathematical foundation, it is known that there is a low-frequency regime where the internal time difference (iTD) as perceived by the animal may well be 2-5 times higher than the external ITD, the interaural time difference, and that there is a frequency plateau over which the fraction iTD/ITD is constant. There is also a high-frequency regime where the internal level (amplitude) difference iLD as perceived by the animal is much higher than the interaural level difference ILD measured externally between the two ears. The fundamental tympanic frequency segregates the two regimes. The present special issue devoted to "internally coupled ears" provides an overview of many aspects of ICE, be they acoustic, anatomical, auditory, mathematical, or neurobiological. A focus is on the hotly debated topic of what aspects of ICE animals actually exploit neuronally to localize a sound source.

journal_name

Biol Cybern

journal_title

Biological cybernetics

authors

van Hemmen JL,Christensen-Dalsgaard J,Carr CE,Narins PM

doi

10.1007/s00422-016-0702-x

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

237-246

issue

4-5

eissn

0340-1200

issn

1432-0770

pii

10.1007/s00422-016-0702-x

journal_volume

110

pub_type

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