Vibration testing and analysis. This has been referred to in a number of different ways, most of which are not meant to be complimentary. Voodoo box, black magic, rocket scientist stuff, etc. It is an unknown for most people, and if something is unknown, people either run from it or attack it.
Customers come in many forms and with many types of needs. My job is to provide a service to a customer which solves his vibration problem. Keep in mind that when vibration becomes an issue, it is a bad thing. Vibration has always existed in mechanical equipment, it just becomes bad when it impacts people, money, and equipment life; otherwise, it goes unnoticed.