If I have the vent blower on high, it keeps the cab pressure up and that helps keep the top from flapping too much. This doesn't work if the windows are open (obviously). On windy days, it doesn't matter either, as the soft door tops will flap open and cause the same effect as the wind just catching a slack sail as you tack, a big WHAP! There was a company that sold a quilted liner, and I imagine with a little creativity, one could be fabricated that would cut down on the noise. Even when mine isn't flapping though (I have the supposedly quieter sailcloth), it has the constant thunder sound from the small amplitude, high frequency vibration. It's a like a big woofer.