If sound goes through solids more easily than air, how do foam and silicone earplugs sound instead of amplifying it when it hits your ears?
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Mass blocks sound. Incoming sound wave has x amount of energy. It is enough to move a cubic centimeter of air which weighs almost nothing. However, the sound wave does not have enough energy to move a cubic centimeter of foam (much heavier) to the same degree. Sound needs energy (loudness) to move mass to travel through it. If the mass is too much for a given loudness, the sound can’t move the mass and the sound doesn’t travel in it. Even if the actual travel speed would be higher if it DID have enough energy to move the mass.
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