Open AccessActive head rolls enhance sonar-based auditory localization performance
Author(s) -
Lakshitha P. Wijesinghe,
Melville J. Wohlgemuth,
Richard H. Y. So,
Jochen Triesch,
Cynthia F. Moss,
Bertram E. Shi
Publication year - 2021
Publication title -
plos computational biology/plos computational biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.628
H-Index - 182
eISSN - 1553-7358
pISSN - 1553-734X
DOI - 10.1371/journal.pcbi.1008973
Subject(s) - human echolocation , marine mammals and sonar , head (geology) , computer science , eptesicus fuscus , sound localization , sonar , acoustics , tracking (education) , artificial intelligence , computer vision , geology , biology , physics , psychology , ecology , pedagogy , geomorphology
Animals utilize a variety of active sensing mechanisms to perceive the world around them. Echolocating bats are an excellent model for the study of active auditory localization. The big brown bat ( Eptesicus fuscus ), for instance, employs active head roll movements during sonar prey tracking. The function of head rolls in sound source localization is not well understood. Here, we propose an echolocation model with multi-axis head rotation to investigate the effect of active head roll movements on sound localization performance. The model autonomously learns to align the bat’s head direction towards the target. We show that a model with active head roll movements better localizes targets than a model without head rolls. Furthermore, we demonstrate that active head rolls also reduce the time required for localization in elevation. Finally, our model offers key insights to sound localization cues used by echolocating bats employing active head movements during echolocation.