...Tanya Bojesen Lauridsen; Jakob Christensen-Dalsgaard ABSTRACT In most anuran amphibians, acoustic communication is of prime importance for mate localization and selection. The tympanic middle ear increases auditory sensitivity and directionality and is therefore expected to be favoured by natural...

... extending from 125 Hz to 4 kHz (5 octaves) with most-sensitive hearing between 0.8 kHz and 1.4 kHz. The high-frequency cut-offs are the lowest found in mammals to date. In contrast to predictions from middle ear morphology, F. mechowii did not show higher sensitivity than F. anselli in the low-frequency...

... be enhanced via the acoustic coupling of middle ear cavities, resulting in a pressure difference receiver (PDR) mechanism. The experiments reported here support a role for a PDR mechanism in alligator sound localization by demonstrating that (1) acoustic space cues generated by the external morphology...

... hearing middle ear Rana catesbeiana sexual dimorphism sexual diergism tympanic membrane `The frog... The croaking that is heard going on in the water is made by the male frogs, and is their call to the females at breeding time.' Aristotle (384–322 BC) The intersexual vocal...

... 3EJ, UK (e-mail: [email protected] ) 15 7 2002 © The Company of Biologists Limited 2002 2002 middle ear bullfrog Rana catesbeiana lever ratio stapes ear evolution hearing When the tympanic membrane of the mammalian middle ear is inflected, the manubrium...

... for correspondence at present address: Department of Zoology, Downing Street, Cambridge CB2 3EJ, UK (e-mail: [email protected] ) 15 7 2002 © The Company of Biologists Limited 2002 2002 middle ear bullfrog Rana catesbeiana laser Doppler vibrometry operculum stapes hearing...

...Yehudah L. Werner; Petar G. Igić; Merav Seifan; James C. Saunders SUMMARY Previous studies of electrophysiological audiograms in gekkonomorph lizards revealed greater sensitivity in adults than in juveniles. We investigated whether this difference, as far as it is affected by the middle ear...

...Sam H. Ridgway; Donald A. Carder; Tricia Kamolnick; Robert R. Smith; Carolyn E. Schlundt; Wesley R. Elsberry SUMMARY Hearing is attenuated in the aerial ear of humans and other land mammals tested in pressure chambers as a result of middle ear impedance changes that result from increased air...

...Yehudah L. Werner; Lynda G. Montgomery; Shawn D. Safford; Petar G. Igic; James C. Saunders ABSTRACT Gekkonoid lizards increase in body size throughout life, and the present study investigates whether changes in auditory function accompany these increases. Middle-ear structures in four groups...