Hmmm aren’t there specialized helmets that have a earmuff headphone/mic set up built in. You do need to hear the traffic around you especially with all the text-ers and cell users that are as impaired as bad or worse than drunk driver.
maybe they make a setup that will block out the base of the motorcycle muffler but allow other sounds through a mic system set somewhere behind a wind break earmuff setup “might” allow the aids to function without feedback.