Why Do Whales Sing (5:12) “Communicating underwater is challenging. Light and odors don’t travel well, but sound moves about four times faster in water than in air — which means marine mammals often use sounds to communicate. The most famous of these underwater vocalizations is undoubtedly the whale song. Stephanie Sardelis decodes the evocative melodies composed by the world’s largest mammals.” TED ED lesson plan available.
The Ecological Risk Assessment Process (7:43) This video is an introduction to determining mitigation and monitoring through the ecological risk assessment process. Supplemental educational resources included. Source: Discovery of Sound in the Sea (DOSITS) Project (www.dosits.org)
Marine Fishes and Hearing (4:29) Video and educational materials related to the physiology of hearing in marine fishes. Source: Discovery of Sound in the Sea (DOSITS) Project (www.dosits.org)
Marine Mammal Hearing Video (5:11) An introduction to marine mammal hearing. This video includes extensive educational materials about underwater hearing. Source: Discovery of Sound in the Sea (DOSITS) Project (www.dosits.org)
What is Sound? (5:15). This video is an introduction to the science of sound and explores the following concepts:
• Sound is created by a vibrating object.
• Sound travels as a wave through a medium.
• A sound wave is an example of a compressional or longitudinal wave.
• The particles in a longitudinal wave move parallel to the direction in which the wave is traveling.
• A sound wave alternately compresses (areas of high pressure) and expands (areas of low pressure) whatever medium it is traveling through.
Source: Discovery of Sound in the Sea (DOSITS) Project (www.dosits.org)
Soundscape - the world according to sound (13:45), The natural world tells unseen stories through sound - all are fascinating but also disturbing. This new science of soundscape ecology is tracking environmental change with small audio recorders and powerful computer processing. Catalyst discovers what we can learn from listening to nature. Source: ABCTVCatalyst.
Juno Listens to Jupiter's Auroras (1:10)Thirteen hours of radio emissions from Jupiter's intense auroras are presented here, both visually and in sound. The data was collected when the spacecraft made its first orbital pass of the gas giant on Aug 27, 2016, with all spacecraft instruments turned on. The frequency range of these signals is from 7 to 140 kilohertz. Radio astronomers call these "kilometric emissions" because their wavelengths are about a kilometer long.
Sonic Images (13:03) Using examples from birdsong, the natural lilt of emphatic language and even a cooking pan lid, singer-songwriter and TED Fellow Meklit Hadero shows how the everyday soundscape, even silence, makes music. "The world is alive with musical expression," she says. "We are already immersed." Source: TED, YouTube.
