Perform Initial Wall Sounding

What happens here

Before using the magnet, the presenter demonstrates tapping on the wall horizontally with his knuckles. He advises listening for a 'denser' sound, which is characteristic of an area with a stud directly behind the drywall, helping to narrow down the search area.

Goal: Lightly tap on the wall and listen for a change in sound from hollow to dense, which indicates a potential stud location.