Our coach includes a washer and dryer, which is very convenient when we’re living in it full-time. But in strong winds at certain angles, the flap that covers the dryer vent would bang in the wind. It is sheltered with a hood, but that doesn’t always help:

The flap under the hood, that covers the vent outlet:

To avoid that annoying banging, which would disturb us at night, I added some strips of self-adhesive felt around the flap, to muffle the sound:

That solved that little annoyance quite satisfactorily.