Experimental Analysis of Space Acoustic Field Positioning Characteristics of Plecotus Auritus Pinna Model

Zhang, Sen; Ma, Xin; Pan, Yong‐Bao; Lu, Hongwang

doi:10.1007/978-981-13-0893-2_42

Cited by 1 publication

(2 citation statements)

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“…For 40 example, Chiu et al conducted experiments based on the behavior of big brown bats 41 (Eptesicus fuscus) and found that the tragus is related to vertical sound localization [21]. 42 In our previous study [22], we obtained similar results using a finite element method 43 (FEM) [23] based on sonar in the brown long-eared bat (Plecotus auritus). In our 44 localization simulation experiments using a bat-like device, we also examined the 45 vertical localization performance of the time-frequency characteristics.…”

Section: Introductionmentioning

confidence: 64%

“…considered the acoustic roles of the physiological structures of bats, including the sound 22 field characteristics related to the facial physiological structure [11], auricle 23 structure [12], and vocal tract [13]. All of these studies have above provided important 24 insights to facilitate the artificial reproduction of echolocation by bats.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic Spatial Target Localization Using Artificial Pinnae of Brown Long-eared Bat

Zhang

Dong

et al. 2020

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AbstractEcholocating bats locate a target by echolocation and their performance is related to the shape of the binaural conformation in bats. In this study, we developed an artificial sonar system based on the vertical sound localization characteristics of the brown long-eared bat (Plecotus auritus). First, using the finite element method, we found that the beam of the first side lobe formed by a pinna constructed according to that in the brown long-eared bat shifted in an almost linear manner in the vertical direction as the frequency changed from 30 kHz to 60 kHz. We established a model of the relationship between the time-frequency features of the echo emitted by brown long-eared bats and the spatial direction by using the pre-trained neural network. We also developed a majority vote-based method called sliding window cumulative peak estimation (SWCPE) to optimize the outputs from the neural network. In addition, an L-shaped pinna structure was designed to simultaneously estimate the azimuth and elevation. Our field experiments indicated that the binaural conformation and relative binaural orientation both played vital roles in spatial target localization by these bats. Accurate echolocation can be achieved using a simple binaural sonar device even without binaural time difference information.

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Section: Introductionmentioning

confidence: 64%