Question

Sound propagates minimum in

Answer 1

Answer:

the slowest sound speed occurs at a depth of about 800 to 1000 meters. This is called the sound speed minimum. The sound speed minimum creates a sound channel in which sound waves can travel long distances.

Answer 2

Answer:Vaccum

Explanation:

Sound propagates through the tiny particles in its path and due to obstruction of these tiny particles sound is produced.In a vaccum due to absence of particles and a medium for the sound to travel sound is not heard in a vaccum