hypophonia amplification device

I have Parkinson's disease. One of the classic symptoms of Parkinson's is hypophonia, a decrease in speech amplitude. My hypophonia is severe and presents a challenge to me in terms of job, family, & friends. I am seeking a small, discreet, and aesthetically pleasing personal amplification device. Here are some criteria. -The microphone should be sensitive as my hypophonia is severe.I'm not averse to a handheld microphone that I bring to my mouth as needed. -I would like an on-off switch on the microphone. -I prefer regular batteries to rechargeable batteries -The speaker should be small and have volume control. I would like to be able to use it for one-on-one conversation as well as in meetings or when lecturing. -it would be great if the speaker could be placed somewhere nearish to where the sound naturally comes from, i.e., my mouth. E.g. the collar of the shirt or pinned to the shirt pocket. Attached to the belt is also possible. -Would be nice if the speaker could be removed and put on the table for meetings -All three pieces (mic, speaker, amplifier) can be separate so no one is too bulky