ENSBox collaborative acoustic localization

Knowledge graph centered on ENSBox collaborative acoustic localization with 29 nodes and 124 connections. Top connected: Marmota flaviventris, Spruce, Zonotrichia leucophrys, Zonotrichia leucophrys oriantha, Zonotrichia leucophrys gambelii.

Method synopsis

A distributed wireless sensor network approach using tetrahedral microphone arrays to detect and localize animal vocalizations through collaborative Direction of Arrival estimation and Maximum Likelihood source localization algorithms.

Synthesized from method descriptions across 3 papers using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — An empirical study of collaborative acoustic source localization (2009), J Sign Process Syst. The protocol was originally introduced by An empirical study of acoustic source localization (2007). Implementations in other papers (listed below) may differ.

1. Deploy ENSBox sensor nodes
   Six ENSBox nodes were deployed in rectangular configurations across the study area. Each node contains a tetrahedral microphone sub-array with 4 microphones positioned at the corners of a cube, with 8cm spacing when viewed from above. Nodes were elevated approximately 1.5m above ground level and positioned to provide overlapping detection coverage.
   Quantities: 6 nodes deployed, 8cm microphone spacing per node, 1.5m elevation above groundDuration: Setup time not specified, deployed for duration of experimentsConditions: Field conditions at Rocky Mountain Biological Laboratory and UCLA courtyard
   Equipment: ENSBox Ver. 1 and Ver. 2 nodes, tetrahedral microphone arrays, tripods
2. Configure detection parameters
   Each node was configured with marmot call detection algorithm using frequency range of 2.25-3.75 kHz for energy detection. Detection threshold was set using adaptive noise estimation with EWMA filters. Sampling rate was set to 24 kHz with 32-point FFT processing every fourth 64-point input window.
   Quantities: 24 kHz sampling rate, 32-point FFT, 2.25-3.75 kHz frequency band, β=32 threshold parameterDuration: Real-time continuous processingConditions: Configured for marmot alarm call frequency characteristics
   Equipment: ENSBox processing units

Typical Equipment

• ENSBox Ver. 1 and Ver. 2 nodes
• tetrahedral microphone arrays

Output Measurements

• source bearing estimates
• localization coordinates
• detection timestamps

Papers Using This Protocol (3)

Species Studied With This Protocol