Do you put a comma in the sentence after hearing sound again i went to find my parents?

Yes, you should put a comma after "again" in that sentence.

Here's why:

* "Hearing sound again" is an introductory phrase. It sets up the main clause of the sentence ("I went to find my parents").

* Introductory phrases are usually followed by a comma. This helps to separate them from the main clause and improve readability.

The corrected sentence is: "Hearing sound again, I went to find my parents."