sound channel sound channelan area of slow sound speed that causes sound waves to become focused at this water depth Related Articles: Glossary: sound channel axisHow fast does sound travel?CTBT Hydrophone StationSound Speed MinimumHow is sound used to monitor nuclear testing?Sound Surveillance System (SOSUS)Sound Travel in the SOFAR ChannelSound Channel VariabilityHistory of the SOFAR ChannelResources for Educators Chris Knowlton2017-02-26T20:10:01-05:00