"Dim" and "screech" don't really go together. Cows don't screech (unless they're at an abattoir). They moo or low.
Sorry!!!! That'll teach me to try and use the forum on my phone!
For a second, I was like, did emsrd2d2 just say crows moo? Something is wrong. But then I realized you have misread the post. You don't make mistakes in English.
I used "dim" because the sound is coming from a distance. Generally, can I use dim for a faint, distant sound?
Sounds from far away are best described as faint or distant rather than dim.
Yes, sounds can definitely be faint though I'm not too keen on grow fainter since the two words seem to be going in opposite directions.
And yes, they can fade. They also fade in and fade out.
Crows don't really squawk, they caw. I think that's the sound you're imagining.
And I don't think sounds waft.
Okay, what about this?
I could hear the faint cawing of crows drifting from inside that old house in the distance.