Turn on your stereo system and perform a microphone check. Tap or speak into the microphone, testing it for feedback and volume control. When you are satisfied with the volume and quality of the sound, gather your materials.
Breathe into the microphone slowly and loudly. Moan and whimper a little, as a ghost might.
Hold a small piece of board close to the microphone. Knock on the wood. Scrap the wood slowly with a garden trowel. You might say, "Let me out," as if you were trapped inside a coffin.
Pick up a heavy chain and shake it a few times.
Slide two shoes with hard bottoms on your hands. "Walk" the shoes across the board making footstep sounds.
Put dried macaroni in a wooden box and shake it back and forth. This sounds like bones in a box.
Make ghost noises with a friend or two. A trio of moaning, scary voices is frightful.