Good idea for a typewriter mat. I use rubber shelf and tool box liner mostly. I have a 1/2 inch thick piece of felt too. The carpet square probably reduces noise better than shelf liner and perhaps as good as felt.
It is not too thick but it does its job: a) well b) cheaply :)
I use one of these, cut down to fit, of course:http://www.harborfreight.com/4-piece-anti-fatigue-foam-mat-set-94635.html
Interesting, interesting. The sale price seems to be very reasonable since you get 4 pieces of these.
Your mat looks like a good solution.I am working on offering some mats to the typosphere; all profits will go to WordPlay. I'll keep everyone posted.
My Erika 105 (shameless plug for my last post) has a very effective mat attached to its base. The key action's as sharp as a tack and the mat's an effective accessory. Would like to get the same for some of my other noisy typewriters,
I look at it as a "plug-back" for the Clockwork Orange ;). Nice posts on both Erika & Anthony B. :)
I'm lining less for sound and more to prevent sliding. I do have an inch-thick foam square that came in the case of a 50's Aristocrat.