
As it happens, there is a hair dryer attached to the end of the changing table, which we use to dry off a damp posterior in between application of the baby wipe and the diaper. The mere sound of this device from across the room had an immediate and profound calming effect, quite unlike all of our parental ministrations.
Several people have mentioned using hair dryer noise as a pacifier, and we have noticed its effects before, but this time was more dramatic. The "sleep sheep" as mentioned previously was not as useful this go-round... perhaps she has built up a certain sheep immunity by this point.
One does wonder what curious mechanism is working inside her head, to which the magic key is apparently a hair dryer.