Once the rainquiettminsert is installedinto the downspout it prevents theraindrops from hitting the bottom ofdownspout breaking up the raindrops asthey hit the insert.
Rain gutter wind noise.
Your gutters have a clog.
The rivet gun tapping one by the window might be gutter or a loose piece of flashing or siding or trim flapping in the wind.
These raingutter fillers are plastic pieces that can be glued in the raingutters on either side of the windshield.
But they also reduce wind noise.
So why do your downspouts in particular sound like a toddler with a cowbell.
Adjust the downspout angle.
If you have a window near your gutters and downspouts the persistent clunk clunk clunk or thud thud thud of rain hitting metal may wake you up rather than help you drift to dreamland.
Contractors have tried fixes like installing a lead plate in the elbow then a magnetic cushioned plate but those fixes usually just change the tone from a metallic drip drip drip to a thud thud thud sound.
The noise usually is caused by water falling down the downspouts and hitting the fitting at the bottom which on many gutters is sharply bent and empties the water into a splash pan or better.
If the gutter is close to a bedroom window this can get annoying.
Surely not every gutter is as noisy as yours.
Gutter downspouts with elbows can sometimes amplify the sound of water dripping through them.
Thankfully there are some tricks to dampening this nerve grating sound.
If not loose sometimes if the hangers are too far apart the gutter sheet metal will buckle in and out making a sound sort of like flexing a cookie sheet or pie tin back and forth a metallic flutter sound.
It is said that these things will give you around 5 km h more top speed because of increased aerodynamics.