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what's the frequency of the insect ? bonaedy asked this question on 5/14/2002: what's the zone frequency hearing of the insects?

beainsc gave this response on 5/15/2002: Many but not all insects can hear sounds, some even hear sounds that we can't hear ourselves. Insects hear through one of four different ways, the most common of which is the tympanum. Tympanal organs always occur as paired organs, they are composed a thin cuticular membrane (the tympanum) stretched across an air space of some sort and some form of connection to the nervous system. In the Orthoptera (Grasshoppers and Crickets) tympanum are common, though situated in different places in different species, i.e. on the third thoracic segment in the Locusts Locusta migratoria and on the front legs in the House Cricket Acheta domesticus . Tympanal organs also occur in the Cicada (Cicadidae, Hemiptera) and some families of the Lepidoptera, (i.e. Noctuidae, Geometridae, and Pyralididae). The other three forms of hearing organs are 1) Johnston's Organ, via the movement of hairs on the antennal scape i.e. the Mosquito Aedes aegypti . 2) Auditory Hairs these occur on some Lepidopteran larvae as well as on some Orthoptera. 3) The Pilifer this is a unique auditory organ found only in the head of certain species of Hawk Moths of the subfamily Choerocampinae, its optimum frequency is between 30 and 70 kHz.

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