I am not familiar with those, but any background noise will help 'mask' sudden and startling noises by providing near constant noise. While I am not a huge fan of TV or radio, both provide music, variations in volume, other sounds and noises, like automobiles, and human voices...all of which pets might hear and be alarmed by when they occur in an otherwise 'library quiet' setting. I sometimes flick the TV on softly even when I'm home with the kids 'cuz...and most any channel will do...otherwise, they are prattling away at every chirping bird outside the window. They calm down when there is a more constant 'noise' going on around them. I'd give it a shot myself.
