{"data":[{"source":"bio.acousti.ca","id":"51482","topic":"behaviour","value":"Spectral analysis of the male calling song (Figs. 2E, S1) shows that most of the song\u2019s energy is contained within a relative narrow frequency band between ca. 8-11 kHz (pooled mean CF=9.2 \u00b1 0.2 kHz, n=5; see also Table S1). Recordings under lab conditions exhibit an additional low amplitude frequency peak at 26-29 kHz that is not present in field recordings. As similar ultrasonic frequency components were reported by Morris & Mason (Morris and Mason, 1995), we assume that the higher frequencies are present in all songs but attenuate quickly under field conditions.\n\nOur results show that the production of loud calling songs in A. acuta relies not only on the use of two, but three mechanical oscillators \u2013 the wings, the pronotal chamber possessing structural resonance, and the Helmholtz resonator formed by the chamber and the animal\u2019s body \u2013 that are set into motion and driven at or close to resonance by the animal\u2019s stridulatory movements.","topic_link":"http:\/\/rs.tdwg.org\/ontology\/voc\/SPMInfoItems#Behaviour","info_url":"https:\/\/bio.acousti.ca\/node\/51482"}]}