I enjoy a freestanding gas oven and chance rumbling noise are coming from inside, what is it? It is not an animal or anything like that; it sounds close...

It is not an animal or anything like that; it sounds close to a rumbling like a gust of twine or something; should i be worried? Also, I had some tech guy come within and read the gas count and it was mundane so I don't know. It's called the "Magic chef" by maytag. Please abet.
Answers:    could be the exhaust hood above the range, where on earth it comes out the wall the wind could be rattle the damper.
The gas is burning inside the venture not out on the burner, it mode that the burner is dirty and needs to be cleaned.