Results 161 to 170 of about 1,831 (196)

AMPHIBIAN UNDERWATER HEARING: BIOPHYSICS AND NEUROPHYSIOLOGY

Bioacoustics, 2008
(2008). AMPHIBIAN UNDERWATER HEARING: BIOPHYSICS AND NEUROPHYSIOLOGY. Bioacoustics: Vol. 17, No. 1-3, pp. 60-62.
Christensen-Dalsgaard, J., Elliott, T.M.
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Biophysics of underwater hearing in the clawed frog, Xenopus laevis

Journal of Comparative Physiology A, 1992
Anesthetized 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; id_orcid 0000-0002-6075-3819, Elepfandt, A   +1 more
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Underwater Hearing and Sound Localization with and without an Air Interface

Otology & Neurotology, 2005
Underwater 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, Zohara, Sharoni, Yoav, Yanir, Yoav, Keynan, Yechezkel, Alfie, Pinchas, Halpern   +5 more
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Underwater Hearing in Turtles

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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Sounding out underwater hearing

Trends in Neurosciences, 2001
Hearing 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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In-Air and Underwater Hearing in the Great Cormorant (Phalacrocorax carbo sinensis)

2016
Hearing thresholds of a great cormorant (Phalacrocorax carbo) were measured in air and under water using psychophysics. The lowest thresholds were at 2 kHz (45 dB re 20 μPa root-mean-square [rms] in air and 79 dB re 1 μPa rms in water). Auditory brainstem response measurements on one anesthetized bird in air indicated an audiogram with a shape that ...
Johansen, Sasia, Larsen, Ole Næsbye, Christensen-Dalsgaard, Jakob, Seidelin, Lars, Huulvej, Tina, Helander Jensen, Kristine, Lunneryd, Sven-Gunnar, Boström, Maria, Wahlberg, Magnus   +8 more
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Underwater Hearing in the Frog, Rana Catesbeiana

Journal of Experimental Biology, 1981
ABSTRACT 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, Richard R. Fay, Yehudah L. Werner   +2 more
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Measuring In-Air and Underwater Hearing in Seabirds

2016
Electrophysiological 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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In-air and Underwater Hearing of Diving Birds

2014
In-air and underwater auditory thresholds were measured in diving bird species, using behavioral and electrophysiological techniques. In the first set of experiments, the auditory brainstem response (ABR) was used to compare in-air auditory sensitivity across ten species of diving birds.
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Effect of Air Bubbles in the External Auditory Meatus on Underwater Hearing Thresholds

The Journal of the Acoustical Society of America, 1969
Thresholds of human hearing were obtained underwater for two conditions: (1) with the external auditory meatus completely water filled and (2) with a bubble of air trapped against the tympanic membrane. The first condition was accomplished by forcibly irrigating the external meatus underwater the second, by placing plugs in the ears in order to ...
H, Hollien, J F, Brandt
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