Everything but the kitchen sink

We recently purchased a white noise machine for Matthew's room, after discovering randomly that the sound of the water running in the kitchen sink calms him down. Actually, it's not just a white noise machine, it is an Infant Sound Therapy machine. Doesn't that sound impressive? It is advertised as playing "10 soothing sounds designed especially for infants to lull your little one to sleep." However, in reviewing these specifically designed sounds, I am left wondering if Matthew is abnormally sheltered. I mean, he's never even been to a tropical rainforest! I think a more appropriate, "therapeutic" choice given his life experience might be "expressway traffic." And forget the sound of ocean waves and waterfalls -- hello, we're landbound here in the midwest! How about "squeaky shopping cart wheel" or "distant drone of theme from Word World." So, for now, we are forced to "lull our little one to sleep" with the "rainfall" setting -- oddly enough, there was no "kitchen sink" option.