I could be a squirrel taking refuge in your attic during the winter. Or it could be a rat.;-)
No, "attic" does not have a short 'a' vowel sound in the first paragraph. The word "attic" is pronounced with a short 'a' like in "cat."
The I has a short I sound as in tic or sick.
One possible hypothesis could be that there is a tree branch or other object scraping against the window due to wind or animals moving around outside. Another hypothesis could be that small animals, such as birds or squirrels, are climbing on the window or nearby structures, causing the scratching sound.
I've got a wasps nest in a air brick & yes they do snore
it was meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Nails scratching on a blackboard are an unpleasant sound. Nattering may be another unpleasant sound.
One could purchase a used cat scratching post at a flea market, yard sale, or a swap meet. One could also check the classified advertisements in their local newspaper.
Use plastic silverware!
Clink and clank mostly, with sliding and scratching sounds from the floor.
It could be a small child who may have been trapped in the attic.
There are different types of attic insulations and grades. To find out what you need go to lowes.com or homedepot.com.