http://gallery.usgs.gov/ en-us A list of the latest audio files and podcasts added to the U.S. Geological Survey's Multimedia Gallery (http://gallery.usgs.gov). http://gallery.usgs.gov/images/USGS.gif http://gallery.usgs.gov/ Do you want to know what it sounds like to break ice in the Arctic Ocean? This audio file is of the U.S. Coast Guard Cutter Healy doing exactly that. This recording was taken outside on the ship's bow, so you can hear the ice breaking on the ship and the wind in the background. We can hear similar sounds in the messdeck, gym, and other places throughout the ship including my room, where it often wakes me from my sleep.

]]> jrobertson - at - usgs.gov (Jessica Robertson) http://gallery.usgs.gov/audios/246 http://gallery.usgs.gov/audios/246 Mon, 16 Mar 2009 00:00:00 EST ClimateChange ice ship Arctic The multibeam sends out a soft ping (12 kilohertz) and the sub-bottom profiler emits a chirp sound (3.5 kilohertz). These sound signals are sent from the ship into the seafloor and the return signals that bounce back are used to determine ocean depth. Some of you, but not all of you, will be able to hear the ping immediately (about half a second) before the chirp. I can hear these sounds faintly throughout the ship, whether in my room, the science lounge or the mess hall. This sound was recorded in my room.

]]> jrobertson - at - usgs.gov (Jessica Robertson) http://gallery.usgs.gov/audios/247 http://gallery.usgs.gov/audios/247 Mon, 16 Mar 2009 00:00:00 EST ClimateChange Arctic ping multibeam seafloor