Cymbals and Percussion

Liam S asked: I need a word or phrase for the tapping or percussion used in clinical examination that starts with the letter V.
10 points for most simple and relevant answer.
Thanks in advance

Liam S asked: I need a word or phrase relating to percussion in an examination. Tap, percuss, etc, anything that relates at all… be creative.
Only condition:
It has to start with or relate to the letter V.