<https://www.themodernvocalistworld.com/topic/1040-swelling-tests/#comment-13500>
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"I have some diplophonia, but when I went to a local ENT I couldn't reproduce the sound.  He did diagnose swelling..in here in BFE with no real singer ENTs and I emailed Dr. Thomas, but he said the same thing, if you can't reproduce the sound there's no use making a long trip to see him.     \n \nIt does seem to go away as I train my head voice and progress through the day.. \n"
<https://www.themodernvocalistworld.com/topic/1040-swelling-tests/>