"Mute Button" as seen on TV
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Mark was using hardware store noise canceling earmuffs over earbuds to make super silent headphones. I took it to the next level by embedding the drivers from Sony MDR-7506s inside noise canceling earmuffs. I posted the project on Instructables.

Not sure if they saw my post or not but SNL had the same idea for a prop in their "Retirement Party" sketch.