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... lines. The group built a device that -- like the echolocation used by bats and dolphins -- sends out high-pitched frequencies ...

Article - News Staff - Apr 24 2009 - 1:57pm - 0 attachments

... from the University of Southern Denmark is fascinated by echolocation . She really wants to know how it works. Surlykke equates the ultrasound cries that bats use for echolocation with the beam of light from a torch: you won't see much with the ...

Article - News Staff - Dec 12 2008 - 1:45am - 0 attachments

... as well as sonar, radar and medical imaging imitating the echolocation of bats. (Echolation involes emitting sound waves and listening to ...

Article - News Staff - Oct 9 2008 - 1:50pm - 1 attachment

... the fruit bats. This has raised the question of whether echolocation in bats has evolved more than once, or whether the fruit bats ... echoes, then these results appear to support the idea that echolocation has evolved more than once in bats. This apparent independent ...

Article - News Staff - Sep 5 2008 - 11:51pm - 0 attachments

... blind humans produce tongue clicks to generate sounds for echolocation. Both bats and humans engage in so-called "motor behaviors" ...

Article - News Staff - Jun 26 2008 - 10:50pm - 1 attachment

... waves as they respond to various sounds, specifically the echolocation clicks of its main predators: the sperm whale, beaked whale, and ...

Article - News Staff - Jul 28 2008 - 8:39am - 1 attachment

... constant as the bat gets closer. Bats emit their echolocation calls at ultrasonic frequencies, i.e. above the human hearing ... to counteract attenuation. Their examination of the echolocation behavior in 11 species of insect-eating tropical bats from Panamá ...

Article - News Staff - Apr 30 2008 - 12:21am - 1 attachment

... conundrum hinged, until last month, on whether flight or echolocation (the amazing ability of bats to generate a sonar-like pulse to ... been arguing in favor of either the flight-first or the echolocation-first hypothesis. There were reasonable arguments on either ...

Article - Massimo Pigliucci - Mar 14 2008 - 12:53am - 0 attachments

Bats generate a measurably distinct aerodynamic footprint to achieve lift and maneuverability, quite unlike birds and contrary to many of the assumptions that aerodynamicists have used to model animal flight, according to University of Southern Californ ...

Article - News Staff - Mar 1 2008 - 11:07pm - 1 attachment

... Eocene bats from Wyoming and the evolution of flight and echolocation. Nature 451, 8 14 de Fevereiro. Speakman, J.R. 2001. The evolution of flight and echolocation in bats: another leap in the dark. Mammal Rev. 2001, Volume 31, ...

Article - Luis Azevedo Rodr... - Feb 13 2008 - 3:37pm - 0 attachments