Congratulations, Eclectus are fun laid back parrots that are really not bothered by anything. I really think it's a myth they need a quiet environment. Eclectus are like most other parrots they really love to be in the thick of the excitement. Even though there is only my hubby & myself as well as all my other parrots, dogs & all the grandkids popping in from time to time nothing upsets any of my eclectus at all.
First up i would take him to the Vets to rule out any medical problem. However diet can have a lot to do with eclectus plucking. Has he had a good quality balanced diet, small amount of seed, pellets lots of veggies & a few servings of fruit daily as well as sprouts & raw nuts. Lets face it eclectus can eat any healthy foods you eat yourself.
Then comes hormones & also boredom. Almost forgot a daily shower does wonders as well. Eclectus just love water.
There are also a couple of products that some swear by that you can give your plucker. Avicalm & featheriffic used together is supposed to work.
Google both for product information.