This is the driver side rear side panel, between the body extension seam (I have a maxi van) just behind the fuel filler, to the tail light, which includes the 90-degree curved corner at the rear of the van. This turned out quite well too. It shows how tough it is to damp the low frequencies though - there's still an appreciable peak at 56 hz, which would probably require adding a panel rib to break up further, in place of adding a huge amount of mass to the panel. Here's a breakdown of the results: Frequency dB Attenuation 19 -19 30 -13 48 -8 56 -6 70 -14 95 -16 120 -21 180 -26 290 -33 310 -25 2900 -18
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