... at the syringeal end and with a variable, restricted opening at the glottal end that lowers the tracheal first resonance to match the f 0 of the coo. The inflated esophagus may function as a Helmholtz resonator in which the elastic walls form the vibrating mass. Such a resonator could support the f 0 over a range...

... bandwidth must be increased but then frequency information is lost. 21 10 1991 © 1992 by Company of Biologists 1992 Tettigoniidae sound reception acoustic filter transient sound Helmholtz resonator Conocephalus dorsalis Steropleurus ortegai . The stridulatory apparatus...