I'm of no help but chipping in, I also have a very noisy 15month old show cocker, Cú, who likes to 'scream' as I call it (very high pitched barking which I thought was a puppy thing but he has not grown out of). Most advice I've been given is to ignore it as giving him attention of any kind is rewarding the behaviour but there are places where that's obviously not an option (i.e. in public spaces). He especially likes to scream while I'm on the phone having meetings or important calls... I'm a solo dog owner so I imagine he's not a fan of sharing me. Mostly I've been using distraction in those circumstances.
He is not an anxious dog by any means and his barking is purely attention or overstimulation but would love to hear what ideas others have to deal with it!