I would not give away my position with any kind of a sound or a verbal warning !!!

If someone is in my home uninvited they are a threat to me .. my wife would call 9-1-1 and be standing behind the back of a large brick chimney for cover .. if they would get past my GSD there would be no verbal warnings from me !! A night light in the kitchen lights the hall so they would be silhouetted if they walked toward the bedrooms .. they would have had to break thru a dead Bolt on a door made in 1890 that is 2 inches thick and the door jam made of the same true lumber 2x6's from 1890 ..

They wouldn't be a drunken neighbor I live on a country road with no neighbors 1/2 mile near me .. or a teen age kid from next door .. all my neighbors kids are long grown and gone ..