Results 161 to 170 of about 1,758 (185)
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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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Marine mammal ears: An anatomical perspective on underwater hearing
The Journal of the Acoustical Society of America, 1998Analyzing structure and function in specialized ears can produce new insights into fundamental hearing mechanisms and lead to technological advances. Research into dolphin echolocation is a classic example. Recently, however, concerns over anthropogenic sounds in the oceans pushed us to develop a broader knowledge of marine mammal hearing, and, in the ...
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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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In-air and Underwater Hearing of Diving Birds
2014In-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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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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Functional analyses of whale ears: adaptations for underwater hearing
Proceedings of OCEANS'94, 2002The echolocation ability of several dolphin species is well documented, but little is known about hearing characteristics of most marine mammals. This paper describes the major features of the peripheral auditory system in both large and small whales and presents a three-dimensional morphometric analysis of the inner ear in 12 species.
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