Title:
Autonomous cricket biosensors for acoustic localization

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dc.contributor.advisor Hu, David L.
dc.contributor.author Mulcahey, Thomas Ian en_US
dc.contributor.committeeMember Sabra, Karim
dc.contributor.committeeMember Weissburg, Marc
dc.contributor.department Mechanical Engineering en_US
dc.date.accessioned 2010-06-10T15:19:29Z
dc.date.available 2010-06-10T15:19:29Z
dc.date.issued 2010-04-08 en_US
dc.description.abstract The goal of this project was to design networked arrays of cricket biosensors capable of localizing sources such as footsteps within dangerous environments, with a possible application to earthquake detection. We utilize the cricket's natural ability to localize low frequency (5 Hz - 600 Hz) acoustic sources using hair-covered appendages called cerci. Whereas previous investigations explored crickets' neurological response to near field flows generated by single frequency steady-state sounds, we investigated the effects of transient waveforms, which better represent real world stimuli, and to which the cercal system appears to be most reactive. Extracellular recording electrodes are permanently implanted into a cricket's ventral nerve cord to record the action potentials emanating from the cerci. In order to calibrate this system, we attempt to find the relationships between the frequency and direction of acoustic stimuli and the neurological responses known as spike trains, which they elicit. The degree of habituation to repeated signals that exists in most neurological systems was also experimentally measured. We process the signals to estimate frequency and directionality of near field acoustic sources. The design goal is a bionic cricket-computer system design capable of localizing low frequency near field acoustic signals while going about its natural activities such as locomotion. en_US
dc.description.degree M.S. en_US
dc.identifier.uri http://hdl.handle.net/1853/33833
dc.publisher Georgia Institute of Technology en_US
dc.subject Biomimetics en_US
dc.subject Cerci en_US
dc.subject Cricket en_US
dc.subject Biosensors en_US
dc.subject.lcsh Biosensors
dc.subject.lcsh Crickets
dc.subject.lcsh Acoustic localization
dc.subject.lcsh Biomimetics
dc.title Autonomous cricket biosensors for acoustic localization en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.advisor Hu, David L.
local.contributor.corporatename George W. Woodruff School of Mechanical Engineering
local.contributor.corporatename College of Engineering
relation.isAdvisorOfPublication 3a7c3f53-fa95-4af2-869f-4acb2ebc5b88
relation.isOrgUnitOfPublication c01ff908-c25f-439b-bf10-a074ed886bb7
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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