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A biomimetic 2D transistor for audiomorphic computing.

Sarbashis Das1, Akhil Dodda2, Saptarshi Das3,4

  • 1Electrical Engineering, Pennsylvania State University, University Park, PA, 16802, USA.

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|August 3, 2019
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Summary
This summary is machine-generated.

This study presents a biomimetic device mimicking barn owl hearing for precise sound localization. The novel audiomorphic technology significantly surpasses natural auditory capabilities.

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Area of Science:

  • Neuroscience
  • Bioengineering
  • Materials Science

Background:

  • Barn owls possess exceptional auditory localization abilities crucial for hunting in darkness.
  • Understanding the auditory cortex's computational map is key to replicating biological sound processing.

Purpose of the Study:

  • To develop a biomimetic audiomorphic device inspired by the barn owl's auditory cortex.
  • To investigate neuroplasticity in artificial auditory systems.
  • To achieve high-precision sound localization exceeding biological limits.

Main Methods:

  • Fabrication of a device using semiconducting MoS2 with split-gates and nanogaps.
  • Integration of tunable RC circuits based on the Jeffress model for interaural time delay.
  • Utilizing global back-gating for simulating neuroplasticity.
  • Employing virtual source model and COMSOL multiphysics simulations for performance analysis.

Main Results:

  • The biomimetic device successfully replicates spatial mapping and temporal delay processing.
  • Demonstrated neuroplasticity capabilities within the device architecture.
  • Simulations predict and explain the device's performance characteristics.

Conclusions:

  • The developed audiomorphic device offers a novel platform for advanced auditory sensing.
  • This biomimetic approach achieves sound localization precision far beyond that of the barn owl.
  • The technology holds potential for applications requiring sophisticated acoustic spatial awareness.