01733nas a2200169   4500008004100000022001400041245008900055210006900144260001600213300001600229490000800245520119600253100001801449700002601467700001901493856005101512       2010                        eng d  a0001-496600aSound emission and reception tuning in three cicada species sharing the same habitat0 aSound emission and reception tuning in three cicada species shar  cJan-03-2010  a1681 - 16880 v1273 a<p>Many animal species acoustically communicate at the same place and time generating complex acoustic environments. However, the acoustic parameter space is usually structured, with each species emitting identifiable signals. While signal partitioning has been reported, very few analyses include the mechanical spectral response of auditory organs. The loud chorus generated by . The vibration pattern of L. plebejus shows traveling waves as previously observed in Ctra. atra. The spectral properties of both calling songs and tympanal auditory systems primarily indicate that each species uses its own frequency band.y, except for C. orni, which is sensitive to the lowest frequency band of its song. In contrast, female TMs are broadly tuned to the male songs. Ctra. atra females differ by tuning to frequencies slightly higher than the male song. Hence, acoustic space partitioning occurs for both emitter and receiver, but does not seem to fully preclude interference risk as some spectral overlap exists. In addition to the local physical ecology of each species, selective attention to conspecific signals is likely to be enhanced by further mechanical and neuronal processing.</p>
1 aSueur, Jerome1 aWindmill, James, F.C.1 aRobert, Daniel  uhttp://asa.scitation.org/doi/10.1121/1.329103601888nas a2200193   4500008004100000245009700041210006900138520127800207653001701485653001101502653002901513653001201542653002001554653001301574100001801587700002601605700001901631856004401650       2006                        eng d00aTuning the drum: the mechanical basis for frequency discrimination in a Mediterranean cicada0 aTuning the drum the mechanical basis for frequency discriminatio3 a<p>Cicadas are known to use sound to find a mate. While the mechanism employed by male cicadas to generate loud calling songs has been described in detail, little information exists to explain how their ears work. Using microscanning laser Doppler vibrometry, the tympanal vibrations in the cicada Cicadatra atra are measured in response to acoustic playbacks. The topographically accurate optical measurements reveal the vibrational behaviour of the anatomically complex tympanal membrane. Notably, the tympanal ridge, a distinct structural element of the tympanum that is a link to the receptor cells, undergoes mechanical vibrations reminiscent of a travelling wave. In effect, the frequency for which the maximum deflection amplitude is observed regularly decreases from the apex to the base of the ridge. It is also shown that whilst female ears are mechanically tuned to the male&#39;s song, the male&#39;s tympanum is only partially tuned to its own song. This study establishes the presence of a peripheral auditory mechanism that can potentially process auditory frequency analysis. In view of the importance of acoustic signalling in cicadas, this unconventional tympanal mechanism may be employed in the context of species recognition and sexual selection.</p>
10abiomechanics10aCicada10afrequency discrimination10ahearing10atravelling wave10atympanum1 aSueur, Jerome1 aWindmill, James, F.C.1 aRobert, Daniel  uhttps://bio.acousti.ca/pt-pt/node/57622