You want to pack it firmly. Too tight and it wont be very effective.

and smile at the noise tester and make a few comments about the weather...or where he's going on holiday this year...or anything else to distract him*

if all else fails.....faint.....

then run....

then hide....

* the word "anyhting" is obviously open to interpretation

through a few fivers in it.dont pack it too tight it gets louder