I used to let a cheap Walmart bell announce for me until it broke, and I can't find the single note item to replace it and don't want to do experimental purchasing to find one (already wasted money doing that). Now I just give people on the sidewalk--no multi-use paths around my area--a wide berth especially since list year when I gave a jogger running past me wide berth on the sidewalk and inadvertently allowed my front tire to drop off the walkway causing a spill resulting in a cracked collarbone and a couple ribs, though I didn't realize it at the time and completed my 15 mile route; my first person-related crash in 4700 miles! But it did teach me to keep everyone wide berth!