The Cause Was Discovered
As soon as David used his camera, he realized that the homeowners were right. The cause of the noise and the vibrations were bees. There were millions inside the wall. He didn’t know how the bees entered the wall. But soon he noticed a weep hole that is common in the houses in the south of the country.
The bees have used the hole and made a massive hive inside the walls. The hive was massive and he knew that he must try and help it. But it was an almost impossible task due to the size and the fact the hive was inside the wall. A good thing is that homeowners were relieved by the answer.