https://www.brainpop.com/science/energy/sound/
How and in which direction does a sound "move"?
How to isolate sound? (To block its way out)
This
This wall doesn't let sound wave travel through, it is imaginary and doesn't exit in the real world.
Real situation
Task: Build boxes with the foam materials to produce a noise-blocking environment for speech recording, so that the speakers' voices are "isolated".
