"A sound which may consist of one or more syllables or pulses and which is normally heard by the human ear as a unitary event. Usually applied to the songs of crickets and related insects." 
"as equated to one movement (= Silbe, G.), Broughton, now abandoned and deprecated as over-restriced." 
"Preferred unitary dictionary sense, as first parameter of analysis: the shortest unitary rhythm element of a soun emission that can readily be distinguished as such by the human ear." bib]57890[/bib]
The BioAcoustica preference is to use echeme.
- . Arthropod Bioacoustics: Neurobiology and Behaviour. Ithaca, New York: Comstock; 1989.
- . Glossarial Index. Teoksessa: Acoustic Behavior of Animals. Acoustic Behavior of Animals. Elsevier; 1963.
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