Hey! Hope y'all are having a good day. Well, got into a problem on this. Help me find the solution? Please?

* Drip—hiss—drip—hiss fall the raindrops / on the oaken log which burns, and steams, and smokes the ceiling beams. / Drip—hiss—the rain never stops.
What's the figurative language of this and why?

ht tp s:// literary-devices.com/content/onomatopoeia/