They do. Sorry, didn't mean to imply high metal content in the inner was responsible for both phenomena. Was just trying to give the benefit of the doubt to these people's claims; it sort of bothers me when "science" is quick to dismiss people's claims. I'm sure a lot of people would call me (us) crazy for thinking we can hear such a high pitch - but since it's kind of unimportant trivia, like being able to roll your tongue, it doesn't matter. If hearing the high pitch was the cause of great suffering, being called crazy to think that was the cause would hurt a great deal more, I imagine.
This does not lessen the problems or make them less real, but it suggests the treatment looks more like treating a thin person convinced he is fat, than like treating allergies, for example.
By the way, the ability to hear CRTs is common among young people with good hearing. Many switched PSUs make high pitched noises too, for example. Nosie pollution is quite a problem, and there's been studies that suggests links between noise even slightly in the ultrasound and stress levels.
Are you sure they don't simply emit 20+ kHz sound?