stolatl
Member
While waiting for the service appointment next week, I started to experiment a bit today. Here's what I did.
When the car is idle:
1. I started by taking all four bumpers off the hatch. With all windows and the hatch closed, I can feel the buffeting effect (probably also the boom effect, but they are compounded in this scenario with no way to distinguish). And my sound level meter measured on average 60 dBA and 85 dBC.
2. Then I put all four bumpers back and adjusted them properly using the envelope method. With countless tries (half a turn on each every time), I seemed to be able to fix the buffeting effect just by adjusting the bumpers. When I could no longer feel the buffeting effect at idle (the boom effect also seemed to be improved but was still there), sound level meter measured on average 60 dBA and 71 dBC.
When the car is moving:
3. Then I drove the car onto highway and put it in autopilot. Sound level meter now measured on average 65 dBA and 95 dBC. That's when the boom effect was the worst. When hitting road bumps, dBC went as high as 107.
From the test drive I did today, does it mean I no longer have a sound buffeting issue? And my focus should be the sound boom issue. If that's the case, which hack (the rigid cap hack from MY-Y and the vinyl tube hack from ilovecoffee) will be able to address the sound boom issue. Or maybe they are essentially the same issue and both methods need to be employed to fix. I'd really appreciate any comments or suggestions from the great minds here while I continue to try.
When the car is idle:
1. I started by taking all four bumpers off the hatch. With all windows and the hatch closed, I can feel the buffeting effect (probably also the boom effect, but they are compounded in this scenario with no way to distinguish). And my sound level meter measured on average 60 dBA and 85 dBC.
2. Then I put all four bumpers back and adjusted them properly using the envelope method. With countless tries (half a turn on each every time), I seemed to be able to fix the buffeting effect just by adjusting the bumpers. When I could no longer feel the buffeting effect at idle (the boom effect also seemed to be improved but was still there), sound level meter measured on average 60 dBA and 71 dBC.
When the car is moving:
3. Then I drove the car onto highway and put it in autopilot. Sound level meter now measured on average 65 dBA and 95 dBC. That's when the boom effect was the worst. When hitting road bumps, dBC went as high as 107.
From the test drive I did today, does it mean I no longer have a sound buffeting issue? And my focus should be the sound boom issue. If that's the case, which hack (the rigid cap hack from MY-Y and the vinyl tube hack from ilovecoffee) will be able to address the sound boom issue. Or maybe they are essentially the same issue and both methods need to be employed to fix. I'd really appreciate any comments or suggestions from the great minds here while I continue to try.