Tracking the Slipper Lobster Using Acoustic Tagging: Testbed Description

Alexandri, Talmon; Miller, Eyal; Spanier, Ehud; Diamant, Roee

doi:10.1109/joe.2018.2880862

Cited by 13 publications

(13 citation statements)

References 20 publications

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“…For each tag's emission, the detecting receiver measures the local arrival time, such that, assuming all N receivers are time-synchronized, localization is performed by TDoA cf. [10].…”

Section: A Study Areamentioning

confidence: 99%

“…2(A). We consider the specification of an actual acoustic tag manufactured by Thelma-Biotel Inc., Trondheim, Norway [10]. These acoustic tags are used globally in applications to monitor fauna in marine environments and to track migration patterns [35], [36].…”

Section: F Numerical Investigation Setupmentioning

confidence: 99%

“…However, in the case of fixed receivers, receptions of a tag's emissions by at least three receivers is required to localize the animal in a twodimensional (2D) plane with no ambiguities. Such localization involves time synchronizing the receivers and fusing their ToA data collection in a time difference of arrival (TDoA) localization framework [10]. In this context, a key for obtaining a large coverage area for tracking the tags is the positioning of the anchored receivers.…”

Section: Introductionmentioning

confidence: 99%

“…However, in the practical case where the seabed is complex and the detection range is not iso-symmetric, a more rigorous way to determine the anchors' deployment location is required. Two examples of the under-utilization of the deployment setup using CP are a testbed setup to track acoustically tagged slipper lobsters, Scyllarides latus, at the Achziv Marine Nature Reserve in northern Israel [10], and a testbed aimed to explore the motion of tagged sandbar sharks, Carcharhinus plumbeus, close to the "Orot Rabin" Power and Desalination Station in Hadera, Israel (32 0 28 N ; 34 0 52 E) [15]. In the former, four receivers were anchored in a triangle according to the CP approach over a rocky seabed, and 19 lobsters were tagged and tracked for a period of 8 months.…”

Section: Introductionmentioning

confidence: 99%

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Design of an Optimal Testbed for Tracking of Tagged Marine Megafauna

Alexandri,

Diamant

2022

Preprint

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Underwater acoustic technologies are a key component for exploring the behavior of marine megafauna such as sea turtles, sharks, and seals. The animals are marked with acoustic devices (tags) that periodically emit signals encoding the device's ID along with sensor data such as depth, temperature, or the dominant acceleration axis -data that is collected by a network of deployed receivers. In this work, we aim to optimize the locations of receivers for best tracking of acoustically tagged marine megafauna. The outcomes of such tracking allows the evaluation of the animals' motion patterns, their hours of activity, and their social interactions. In particular, we focus on how to determine the receivers' deployment positions to maximize the coverage area in which the tagged animals can be tracked. For example, an overly-condensed deployment may not allow accurate tracking, whereas a sparse one, may lead to a small coverage area due to too few detections. We formalize the question of where to best deploy the receivers as a non-convex constraint optimization problem that takes into account the local environment and the specifications of the tags, and offer a sub-optimal, low-complexity solution that can be applied to large testbeds. Numerical investigation for three stimulated sea environments shows that our proposed method is able to increase the localization coverage area by 30%, and results from a test case experiment demonstrate similar performance in a real sea environment. We share the implementation of our work to help researchers set up their own acoustic observatory.

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“…For each tag's emission, the detecting receiver measures the local arrival time, such that, assuming all N receivers are time-synchronized, localization is performed by TDoA cf. [10].…”

Section: A Study Areamentioning

confidence: 99%

Section: F Numerical Investigation Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of an Optimal Testbed for Tracking of Tagged Marine Megafauna

Alexandri,

Diamant

2022

Preprint

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“…A dedicated acoustic testbed for small-scale areas (50 cm x 50 cm) is also proposed and consists of a wooden base with 4 microphone modules in the corners [6]. Besides indoor situations, underwater acoustic localization is often the main focus of the acoustic testbed and can be found both as a simulation model [7] and as an implemented setup in the sea [8]. None of the existing real-life testbeds mention acoustic properties of the rooms or offer a flexible room-size test infrastructure, which can simplify the repeatability of measurements.…”

Section: Introductionmentioning

confidence: 99%

Techtile: a Flexible Testbed for Distributed Acoustic Indoor Positioning and Sensing

Delabie¹,

Cox²,

Strycker³

et al. 2022

Preprint

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The proposed infrastructure, named Techtile, provides a unique R&D facility as features dispersed electronics enables transmission and capturing of a multitude of signals in 3D. Specific available equipment that enhances the design process from smooth prototyping to a commercial product is discussed. The acoustic parameters of the room, particularly the reverberation and ambient noise, are measured to take these into account for future innovative acoustic indoor positioning and sensing systems. This can have a positive influence on the accuracy and precision. The wooden construction represents an acoustically challenging room for audible sound with a maximum measured RT60 value of 1.17s at 5kHz, while for ultrasound it is rather challenging due to the present ambient noise sources. In general, the Techtile room can be compared with a home or quiet office environment, in terms of sound pressure levels (SPLs). In addition to the acoustic properties, possible research and development options are discussed in combination with the associated challenges. Many of the designs described are available through open source.

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