| These are graphs taken with an impulse analyzer, of the frequency response of a violin (upper frequency limit of 1kHz) with and without a Pocket Rocket next to but not touching it (sitting on the same foam isolation pad.)
There is a piezoelectric pickup in a small "hammer" and another in a pickup that is in firm contact with the top plate near the bridge. The signals from lightly striking the violin from both pickups are sent to the analyzer where the striking impulse force has to fall within a preset window. The small differences that remain are scaled within the analyzer, and then averaged over a count of eight valid hits.
"VE1 vs VE2" and the rest are the resulting frequency curves of the violin with Pocket Rockets 2-5 in comparison with Pocket Rocket 1. As you can see, there is no doubt that the frequency response of the violin in all cases are quite different. |
