I tried a throat mic and found that any movement or sound - such as turning my head or swallowing - would open the channel and cause the icomm to activate a static burst. I didn't care for that so switched to using the headset mic that came with the Aker.
The First Imperial Stormtrooper Detachment forums at whitearmor.net probably have the most info on comm systems, I recommend . I've had this one bookmarked for a while but have never used it. Is this for a Stormtrooper, or other costume? When I joined 3 years ago apps weren't available that did this so I have the physical icomm device that inserts the static bursts into the microphone/speaker system. It's available at http://store.voicebooster.com/icomm-imperial-communication-system/. The company is owned & run by a 501st Legion member who offers discounts to 501st members.
Hi Rebecca, If nobody locally comes forward with the capability, I recommend checking out the IOC Detachment forums. I think the user who goes by MollieMakes is a preferred vendor, and you can likely send your material to her.
Looks like you received plenty of extra belt rivet covers. If once you're done your build you find you have extras, I'd love to get some from you! I still have to redo my Anovos belt and I know I'm going to have trouble with those.