poprock wrote:This is amazing stuff: Boston University researchers have developed a technique for perfect soundproofing without needing to wall anything off. You put a carefully designed moulding into the rim of a hole and sound can then not pass through that hole. It’s designed to block specific sounds, or specific frequencies.
Short overview and full science version.
SpaceGazelle wrote:it expands when it freezes.
SpaceGazelle wrote:Yep, the only liquid. Magical stuff.
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