Results 191 to 200 of about 2,387 (222)
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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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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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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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In-Air and Underwater Hearing in the Great Cormorant (Phalacrocorax carbo sinensis)
2016Hearing 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 +8 more
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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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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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Effect of Air Bubbles in the External Auditory Meatus on Underwater Hearing Thresholds
The Journal of the Acoustical Society of America, 1969Thresholds 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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Mechanisms of underwater hearing in larval and adult tiger salamanders ambystoma tigrinum
Comparative Biochemistry and Physiology Part A: Physiology, 19831. A standing wave tube apparatus was used to determine the biophysical basis of underwater hearing in Ambystoma tigrinum. 2. A. tigrinum responds to the pressure component of underwater sound, and the mouth cavity appears responsible for transduction of sound pressure. 3.
T E, Hetherington, R E, Lombard
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1974
Abstract : The ability of divers to discriminate the angular separation of two sound sources in the presence of high ambient noise in a reverberant environment was tested. In a first experiment it was found that divers could not discriminate directionality with separations as large as 90 degrees for low signal-to-noise ratios.
Gilbert Dering +2 more
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Abstract : The ability of divers to discriminate the angular separation of two sound sources in the presence of high ambient noise in a reverberant environment was tested. In a first experiment it was found that divers could not discriminate directionality with separations as large as 90 degrees for low signal-to-noise ratios.
Gilbert Dering +2 more
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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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