sound channel sound channelan area of slow sound speed that causes sound waves to become focused at this water depthRelated Articles: Glossary: sound channel axisSound Surveillance System (SOSUS)How fast does sound travel?History of the SOFAR ChannelHow is sound used to monitor nuclear testing?Sound Speed MinimumSound Travel in the SOFAR ChannelHow does sound travel long distances? The SOFAR ChannelSound Channel VariabilityResources for Educators Chris Knowlton2017-02-26T20:10:01-05:00