Sentences with phrase «hydrophones picked»

In May 1997, hydrophones picked up the «Slowdown» sound.

Not exact matches

Just imagine a crack that lasts 1/10, 000 of a second but can be picked up by hydrophones — and heard by other sperm whales — at a distance of 15 miles or more.

Evidence of these eruptions showed up on distant seismometers, which measure waves passing through the ground to record earthquakes, and hydrophone arrays that pick up underwater sound to detect covert nuclear detonations.

The Navy wanted to know if hydrates under the seafloor were interfering with acoustic signals picked up by an underwater hydrophone array used by the military to track Soviet subs.

The sound blasts reflected from the boundaries between rock layers a few miles beneath the ocean floor were picked up by an five - mile - long «streamer,» or hose containing many hydrophones, towed just beneath the surface behind the ship.

After the seismic survey, the Langseth returned to pick up 60 seismometers, leaving behind 20 broadband seismometers and the hydrophones that will listen for a year to the reverberations from distant earthquakes, allowing the seismologists to map structures as deep as 60 miles beneath the surface.

Throughout the night and day that the hydrophones were on the seafloor, they picked up what Rountree describes as «drumming» and «duck - like» noises.

These stations have an underwater microphone called a hydrophone that picks up specially coded messages released by the transmitters attached to the rays.