Results 181 to 190 of about 35,100 (222)
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Biophysics of underwater hearing in the clawed frog, Xenopus laevis
Journal of Comparative Physiology A, 1992Anesthetized clawed frogs (Xenopus laevis) were stimulated with underwater sound and the tympanic disk vibrations were studied using laser vibrometry. The tympanic disk velocities ranged from 0.01 to 0.5 mm/s (at a sound pressure of 2 Pa) in the frequency range of 0.4-4 kHz and were 20-40 dB higher than those of the surrounding tissue.
Christensen-Dalsgaard, J, Elepfandt, A
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Towards a fish-inspired underwater hearing device
SPIE Proceedings, 2014We draw inspiration from the fish “hearing” organ, the otolith, to create a portable engineering device that can augment a human diver’s ability to hear underwater. The otolith is an inertial displacement sensor, consisting of a dense bony mass that acts as a reference to the surrounding sensory hair cells. The challenges in adapting the otolith into
Tony C. H. Tse +3 more
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Sounding out underwater hearing
Trends in Neurosciences, 2001Hearing by Whales and Dolphinsedited by W.W.L. Au, A.N. Popper and R.R. Fay, Springer-Verlag, 2000. £89.50 (490 pages) ISBN 0387 949 062The song of the humpback whale and the whistles of the TV star ‘Flipper’ have excited popular imagination to some aspects of the bioacoustic behavior of whales and dolphins.
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2016
The hearing of turtles is poorly understood compared with the other reptiles. Although the mechanism of transduction of sound into a neural signal via hair cells has been described in detail, the rest of the auditory system is largely a black box. What is known is that turtles have higher hearing thresholds than other reptiles, with best frequencies ...
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The hearing of turtles is poorly understood compared with the other reptiles. Although the mechanism of transduction of sound into a neural signal via hair cells has been described in detail, the rest of the auditory system is largely a black box. What is known is that turtles have higher hearing thresholds than other reptiles, with best frequencies ...
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Underwater hearing sensitivity of two ringed seals (Pusa hispida)
Canadian Journal of Zoology, 1975Minimum audible field, underwater audiograms from 1 to 90 kHz were obtained for two ringed seals (Pusa hispida). The audiograms exhibited a uniform sensitivity, to within ± 7 dB, in the frequency range 1 to 45 kHz. Above 45 kHz the threshold increased at a rate of 60 dB per octave. The lowest threshold was −32 dB relative to 1 μbar (68 dB re 1 μPa) at
J M, Terhune, K, Ronald
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Underwater Hearing in the Frog, Rana Catesbeiana
Journal of Experimental Biology, 1981ABSTRACT Comparable auditory sound pressure level (SPL) and sound intensity level (SIL) threshold curves were determined in air and under water in Rana catesbeiana. Threshold curves were determined using chronic metal electrode implants which detected multi-unit responses of the torus semicircularis to incident sound.
R. Eric Lombard +2 more
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Obtaining Underwater Hearing Data for the Common Murre (Uria aalge)
2023Many species of seabirds dive to great depths and for prolonged intervals in pursuit of food, and they may therefore be affected by anthropogenic underwater noise. The paucity of seabird hearing data precludes the current understanding of noise impacts and limits the abilities to enact with informed mitigation efforts.
Hansen, Kirstin Anderson +2 more
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Underwater Hearing Thresholds in Man as a Function of Water Depth
The Journal of the Acoustical Society of America, 1969Thresholds of human hearing were obtained underwater at depths of 35, 70, and 105 ft. Subjects were six divers experienced in taking underwater hearing-threshold tests by a modified Békésy technique. No significant effect resulting from the depth was noted.
J F, Brandt, H, Hollien
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Underwater Hearing and Sound Localization with and without an Air Interface
Otology & Neurotology, 2005Underwater hearing acuity and sound localization are improved by the presence of an air interface around the pinnae and inside the external ear canals.Hearing threshold and the ability to localize sound sources are reduced underwater. The resonance frequency of the external ear is lowered when the external ear canal is filled with water, and the ...
Avi, Shupak +5 more
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Measuring In-Air and Underwater Hearing in Seabirds
2016Electrophysiological methods were used to measure the in-air hearing of 10 species of seabirds. There are currently no measures of the underwater hearing abilities of diving birds. In preparation for constructing a behavioral audiogram both in-air and underwater hearing, several species of diving ducks were raised.
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