Hello Robert,Similar to what John said, I had vocal surgery for AD-SD so have more breathing struggles (more similar to AB-SD) post-surgery.
I own a Chattervox, but my voice is so erratic that it doesn't work for me. The ugly voice is also amplified, and so are the breathing spasms. No one wants to hear such sounds louder. For people with a fairly even soft voice, some amplifiers work well.
I won't give you a website (commercial URL's disallowed on this BB) but do a Google search on "Luminaud." There is much information there, about devices similar to what you describe.
Also, I'm on SSDI (Social Security Disability for severe voice and breathing) so feel free to write me off the BB for additional information.
Good luck!
--Lynne (AD-SD; RLN surgery; PVFM; Northern California)