Compare "foil, wooden ruler, cotton, the best sound effect of what kind of material is nylon rope
Record sound propagation in different objects, aluminum foil, wood ruler, cotton thread, nylon rope.
If it is from the package, the aluminum foil seal is good, and nylon is good and can be pulled from the tenacity
Aluminum foil. The acoustics are solid, liquid, gas. Metal > Plastic > wood material > water > air
The best foil transmission effect, because the metal sound effect is the best
