Tag Archive: space

Humans can use sound to estimate sizes of enclosed spaces

ScienceDaily writes about fascinating research in echolocation in “Echolocation: Sizing up spaces by ear.” The article tells us about research conducted at Ludwig-Maximilians-Universitaet (LMU), and led by Lutz Wiegrebe, a professor in the Department of Biology at LMU, that has shown that sighted people can be taught to estimate room size with the help of self-generated clicks. The research also found differences in how reflected sound affected the visual cortex of sighted versus blind participants.  Namely, with a “congenitally blind participant…reception of the reflected sounds resulted in the activation of the visual cortex.” “That the primary visual cortex can execute auditory tasks is a remarkable testimony to the plasticity of the human brain,” says Wiegrebe. Interestingly, sighted subjects “exhibited only a relatively weak activation of the visual cortex during the echolocation task.”  Click the link above to read the entire article. It’s a very interesting read.

Link via Cheryl Tipp.

Looks like the worldwide hum has a companion:

Mysterious whistle-like noise from Caribbean Sea is so powerful that it can be heard from space.

The sound, a whistle, is so powerful its vibrations can be picked up from space.  By machines.  Humans can’t hear it because the sound,  at “nearly ’30 octaves below the bottom of a piano,” is beyond human hearing range.