Deep-ocean pressure and temperature trade-offs create a sound-speed minimum waveguide

Evidence

This deep, cold, and clear body of water stretches about a mile across and 15 miles long and is entirely surrounded by steep mountainsides. Its icy waters cool the air immediately above, allowing sound to travel much farther and clearer than normal. Sound waves travel at different speeds depending on the temperature, so the cold, thin air layer that hugs the surface of the lake puts an invisible ceiling on the lakeside amphitheater, enclosing the sound, with remarkable results. Sound echoes back and forth across the lake, connecting everyone and everything. — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 241 (#expands, via linked claim)

Categorization

• XREF: connects to: Speed of sound depends on temperature, not pressure; Cold water layers create a natural acoustic amphitheater — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 241; Temperature layers in water can hide submarines from sonar. — David Howard, Jamie Angus, coustics and Psychoacoustics, 332 (+1 more)

Related

• Cold water layers create a natural acoustic amphitheater (similarity 0.90)
• Cold air hovering over a lake traps and echoes sound across the water (similarity 0.86)
• Temperature layers in water can hide submarines from sonar. (similarity 0.81)
• Ocean depth creates a wave-guiding sound speed minimum around 800 meters (similarity 0.79)

Broader Connections

• Cold water layers create a natural acoustic amphitheater #expands (0.95) — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 241
• Speed of sound depends on temperature, not pressure #contradicts (0.85)