I thought we were talking about physical matter.
While there are many things that can affect the state of physical matter, they do not create it from nothing. Sound moves things, it doesn't create them. Light makes heat which changes the speed of the particles, it doesn't create them. Waves cause rock to break into smaller pieces and/or to change location, it doesn't create it. The items being moved, burned or eroded were there already, and continue to be there long after they are moved, burned or eroded - they are just in a different form.
Are we talking about the same thing here?
To get back to the original assertion, I interpret this part
"is indistinguishable from its immediate surroundings"
to mean not that our senses can not distinguish them, but that molecularly they are indistinguishable. The car was once rock, which was once a mountain, which was once the bottom of the ocean, which was once lava etc.