Incidentally, I have been doing this for making bitters for years. I have an ultrasonic cleaner and I fill it with a warm water. Then I put liquor and flavorings in a jar - sometimes grain alcohol, sometimes 151, sometimes strong bourbon, depending on the intended result - and hit it with ultrasound for about 30 minutes at 100F. I make about 2-3 fluid ounces at a time and it works great. Not sure I'd call it (Aging), but it certainly does infuse things well. for certain things, like fresh rosemary, you can see the oils separating from the leaves as soon as the ultrasonic starts. it is nearly instantaneous.<p>I suspect that the time is a function of surface area. If instead of wood chips they used shavings, I'd bet that they could take the time down even further.