The Heard Island Test and Climate Change
Renowned oceanographer and geophysicist Walter Munk talks about efforts to measure ocean warming through sound in a test done near Heard Island, an
Subject: sound
Transcript: quotes, into all ocean basins Of the world. Sound, like light, travels along great circles on the sphere, Not that they there are no straight lines on the
Temperature and the Velocity of Sound
Renowned oceanographer and geophysicist Walter Munk talks about the relationship between temperature and the velocity of sound, observing that
Subject: sound
Transcript: The velocity of sound increases with temperature, With increasing temperature, It increases with increasing pressure, And it increases with
Shadow Zones
phenomena, and behind which the volume of sound is much lower than in surrounding areas.
Subject: sound
Transcript: Well a shadow zone should be familiar to people. In land, i mean if you have an object that scatters things, Sound in all directions, then behind
Scattering
Renowned oceanographer and geophysicist Walter Munk talks about scattering, which occurs as sound bounces off bubbles, suspended particles, organisms
Subject: sound
Transcript: Scattering is entirely different. It depends on inhomogeneities in the acoustic path to interfere, To reflect sound that would otherwise go unimpeded