Beneath the Surface: Spreading, Scattering and Shadow Zones
The rate at which sound spreads out in the ocean is affected by scattering, which often occurs when sound waves hit boundaries, like the seafloor and
Subject: sound
Transcript: . If you drop a rock in a pond and you see the ripples spread out, The same thing happens to sound in the ocean. If you have a source of sound, sound
Beneath the Surface: Using Sound to Study the Ocean's Interior
Sound is sometimes used to study the ocean's interior. For example, the speed of sound in the ocean can be used to measure the temperature between
Subject: sound
Transcript: [narrator:] today, sound in the marine environment is used Min a number of ways that extend well beyond the original military applications. [riser
Beneath the Surface: Water and the Speed of Sound
Sound in the ocean travels about five times as fast as it does in the atmosphere. As with light, absorption plays a major role.
Subject: sound
Transcript: [narrator:] just as seawater has a significant impact Mon light in the ocean, so too, does it affect sound. With not a very loud source-- a couple
Beneath the Surface: Use of Sound by Marine Mammals
Marine mammals use sound in much the same way that animals on land use their sight and, to some extent, their hearing. It offers the best means by
Subject: sound
Transcript: [narrator:] the utilization of sound Min the marine environment extends beyond human applications. [worcester:] marine mammals use sound in the ocean
The Ocean as a Sound Channel
Renowned oceanographer and geophysicist Walter Munk talks about differences in the ways sound travels in the ocean as compared to through the air. He
Subject: sound
Transcript: The ocean acts as wave-guide, as a sound channel. That means that at some depth, typically one kilometer, The sound speed is at a minimum. It
Spreading
Renowned oceanographer and geophysicist Walter Munk observes that spreading decreases the energy of sound as it travels. Energy loss due to spreading
Subject: sound
Using Sound to Measure Ocean Warming
Renowned oceanographer and geophysicist Walter Munk talks about efforts to measure ocean warming through the use of sound--a process known as dark
Subject: sound
Transcript: started doing what is called a Dark acoustic thermometry of ocean climate. Taking advantage of the extraordinarily good propagation Properties of sound in
Noise Pollution and Marine Life
Renowned oceanographer and geophysicist Walter Munk talks about the impact of sound on marine animals. He discusses the campaign of environmental
Subject: sound
Transcript: entirely from shipping. The intensity of shipping has gone up. The propagation of sound in the oceans is so good that if you're Sitting in mid ocean, you
Marine Animals and Sound
Renowned oceanographer and geophysicist Walter Munk talks about the use of sound by marine animals. Professor Monk observes that while scientists don
Subject: sound
Transcript: there. There is a lot of sound going on at all times, it's really a Wonderfully noisy environment. Marine mammals have known far longer than
Sonar
Renowned oceanographer and geophysicist Walter Munk talks about sonar, which stands for sound navigation and ranging, the process by which objects
Subject: sound
Transcript: , Listening. Listening to submarines, of this sort. Active sonar is that you send out a sound wave, which is Reflected from the object you're trying to find