Percepticle: Index

Percepticle: Index

The Percepticle is a small, battery powered audio I/O device, adaptable for a wide variety of distributed sensing requirements. Swarms of Percepticle units, connected by radio links, will be programmed for audio source tracking and isolation, providing the long sought-after "virtual microphone" that can hear a talker's voice while screening out reverberation, other voices, or background noise ... all without the talker wearing a lapel mic or having to speak into any kind of microphone.

Otolith's prototype Percepticle is based on Moteiv's Tmote Sky, which provides a computational platform, with power management and ZigBee radio interface, that includes several A/D inputs and D/A outputs -- just waiting for sensors and actuators to be connected to them.

The Percepticle adds a microphone input and a speaker output to the Tmote Sky, allowing swarms of Percepticles to communicate with each other via radio and audio at the same time. Speed of sound delays in the audio signals, compared to the much faster radio signals, allow the Percepticle motes to locate each other in space. The resulting cloud of Percepticles will be able to pick up audio sources (talkers) and track them independently of other sound sources ... i.e. they will, if and when we develop the algorithms to do so!

For the benefit of other researchers working with these motes, and for the benefit of other researchers in Blind Source Separation techniques, here are some journaled notes on the development of Percepticle motes.

  1. Wiring for breadboard development

This page maintained by Wil Howitt
Last updated 30 December 2005