CONTROL THE SHAKES
s its name suggests, vehicle shake is a low-frequency vibration that can be triggered by imperfections in the road. For a Rolls Royce, the typical shake frequency was around 10Hz (Hertz, or cycles per second). We had a favourite local road and speed that would tend to excite a continuous shake if the car was that way inclined. This meant we could record it with accelerometers and a
