In 2007 ATI launched an effort to develop a suite of communications earplug products. Audio and electrical components were integrated into hearing protector earplugs, for connection to military/industrial radio systems. The results allow people to work comfortably in loud noise while still hearing high-fidelity comms.
Communications Earplug Product images, link (2013-12-01)
We used an ISO 9001:2000 certified product development process - gated design reviews, formal quality management system, etc. Key phases in the process included:
Each product variant has specific purposes and specs, the 2-way comms pendant is one example: