I found a solution that will mitigate the sound, but not entirely. Basically you need a 5"x5" piece of neoprene rubber with adhesive backing. On Amazon, XCEL makes a 6"x6"x1/2' that does the job. You'll need to cut the piece down to 5"x5", but it's easy to cut with scissors or a general purpose blade. Before you slide it into the grill slot, loosen the backing about 1/2 way, but DO NOT remove it! Slide the part with the backing that's not loosened in first and guide the piece in front of the VESS speaker. It's a little tricky to remove the backing, but when you do, align the neoprene as best you can to cover the entire VESS speaker and press down over the entire face to ensure complete adhesion. It will be noticeably quieter (over 50%). This will still provide good safety, without waking the neighbors!