Audix have recently announced a new set of AVB enabled ceiling hanging microphones, which you will be able to utilise without compromising your audio quality or budget!
This microphone range includes:
a hanging ceiling microphone (M55), a flush mount directional ceiling microphone (M70) and a gooseneck style ceiling microphone (M40).
Optimised for speech intelligibility, and it's range can cover up to 20 inches to allow users to move freely around the space without experiencing any drops in audio.
The product should be available to purchase late this year!
[information from AV magazine]