Picometre scale mechanics in the cicada ear

J.F.C. Windmill, D. Robert, J. Sueur

Research output: Contribution to journalArticle

Abstract

Female cicadas use sound to select their mate from a chorus of singing males. Cicadas have tympanal ears, with both the ear's tympanal membrane, and constituent tympanal ridge, acting as acousto-mechanical transducers and frequency filters. Within the ear the tympanal ridge is mechanically connected to a large number of mechanosensory neurons via a cuticular extension known as the tympanal apodeme. Using microscanning laser Doppler vibrometry, the in vivo vibrations of the tympanal apodeme of female Cicadatra atra have been measured for the first time as they respond to the motion of the tympanal membrane driven by sound. These precise measurements reveal that the tympanal membrane's nanometre motion is over a magnitude greater than that of the tympanal apodeme at the point where the neurons attach. Further, the tympanal apodeme acts as an additional mechanical frequency filter, enhancing the frequency filtering of the tympanal ridge, to narrow the frequency band of vibration at the mechanoreceptor neurons solely to that of the male calling song. This study thus enhances our understanding of the mechanical links between the external ear of the cicada and its sensory cells. Poster Session held on Tuesday 30th June 2009 at the Annual Meeting of the Society for Experimental Biology, 28th June-1st July, Glasgow, UK.
LanguageEnglish
PagesS130-S130
JournalComparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology
Volume153A
Issue numberS2
DOIs
Publication statusPublished - Jun 2009

Fingerprint

Hemiptera
Mechanics
Neurons
Ear
Vibration
Membranes
Acoustic waves
External Ear
Singing
Posters
Mechanoreceptors
Music
Transducers
Frequency bands
Lasers

Keywords

  • cicada ear
  • experimental biology

Cite this

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Picometre scale mechanics in the cicada ear. / Windmill, J.F.C.; Robert, D.; Sueur, J.

In: Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology , Vol. 153A, No. S2, 06.2009, p. S130-S130.

Research output: Contribution to journalArticle

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