5 ms·I don't think it would be that hard to invent. What's hard is making it silent and compact.by skore 13y agoI don't think it would be that hard to invent. What's hard is making it silent and compact.jacquesm 13y agoShow me.skore 13y agoWell, a double walled enclosure with vacuum inbetween would seal out a lot. Plus you could market it as "the double vacuum". Profit!jacquesm 13y agoThe problem is the outflowing air. That's where the noise comes from.skore 13y agoWell, that's where "lots of corners in the airpipe design" comes in. That, plus what I said before are big points in making something big.