There are two types of Vibration that I am aware of:
This is commonly used in Enochian magic, Golden Dawn magic, etc When you vibrate divine names, you are adding your emotion poured into it, and you concentrate on a long slow format of the name:
Th-awww-thth for Thoth for example. Or R-a-a-a-a, really as long as your breath can be exhaled, you are speaking through the exhale in a sine wave form.
This is the ability to control chaotic states of mind, and send/receive thought. Students in the air grade often get overwhekmed because thoughts are out of control, so control them.
From Raymond Buckland for a Vibration Exercise (Book of Spirit Communications by Raymond Buckland):
Hope this helps a few.