'That's' in the Bible

Zadok the priest and Nathan the prophet have anointed him king in Gihon. They have gone from there rejoicing. The town has been in an uproar; that’s the noise you heard.

Now the king of Aram’s servants said to him, “Their gods are gods of the hill country. That’s why they were stronger than we were. Instead, we should fight with them on the plain; then we will certainly be stronger than they will be.