David thanks for helping I don't follow the TD that close unless a friend of mine is out there. I know John Shilling who started this year had bells and a blue tooth speaker for added noise up that way.
Bells and a bluetooth speaker are probably less than ideal solutions, IMO. There is a great YouTube video of a NOLS presentation by bear expert Tom Smith of Brigham Young University where he talks about what types of sounds bears react to, plus a wealth of valuable information about safety in bear country:
https://www.youtube.com/watch?v=PExlT-5VU-YIt seems that bears don't seem to react to unnatural sounds much, such as bear bells. But they will react to the human voice. So you have to yell things like "Hey bear!" a lot as you travel (I have literally spooked a bear out of thick shrubs 20 meters/50 feet down the trail doing this). And you have to be especially loud going through tight cover and around corners where sight lines are poor. Surprising a bear while biking is the most likely reason for a bear encounter.
As others have stated, having a scent-free camp is important, too. Hang your food, pots, toothpaste, chain lube, lip balm, sunscreen, garbage, etc. (ANYTHING with a scent) 100 m downwind of of your campsite, and cook in a different location. Bears have an incredible sense of smell (best of any land animal on the planet), and they are naturally curious, so try to mitigate that risk by ensuring every item with a potential to smell like food or anything novel to bears is away from your camp.
Follow those two general rules, and you should be fine in bear country.
Oh, and make sure you know how to use your bear spray in an emergency - practice getting it out of the holster and ripping off the safety. There have been many stories of people who had bearspray with them, but never used it on a bear for various reasons (inaccessible in their pack, forgot to remove the zip tie on safety after purchase, couldn't get it out of their holster quick enough, etc.). And know the limitations of the spray - you only get about 8 -10 seconds of spray, so you have to use it very wisely. A little research on effective use of bear spray and some practice is very important if you want it to work when needed. Hope that helps.