'Sound' in the Bible

Now Elisha was sitting in his house, and the elders were sitting with him. And the king sent a man ahead of him [to behead Elisha]; but before the messenger arrived, Elisha told the elders, “Do you see how this son of [Jezebel] a murderer has sent [a man] to remove my head? Look, when the messenger comes, shut the door and hold it securely against him. Is not the sound of his master’s feet [just] behind him?”

So they came and called to the gatekeepers of the city. They told them, “We went to the camp of the Arameans (Syrians), and behold, there was no one there, nor the sound of man there—only the horses and donkeys tied up, and the tents [had been left] just as they were.”