Every time I put my kayak on top of my car, it makes an annoying buzzing sound once we approach 30 mph or faster. I'm assuming this is from the cords used to strap it down. This weekend we are bringing it up to Minnesota and I need to minimize the sound as much as I can so that we don't go crazy on the 8 hour drive. Below is a somewhat helpful image of how we strap the kayak. There are cords that also run from the front bumper to the bow of the boat, then we have the two straps that go inside the car through the doors and over the boat. We also have a cord from the back bumper to the back end of the kayak. Any questions, please ask. Thanks for your help!