Can recommend the bicycle horn sold by Riese and Müller. Elevates your game from “might get attention of a pedestrian” to “will get attention from car drivers”.

Link

Just a design, not an actual product one can buy (yet?). Too bad.

I checked if it was published the 1st of April, but no, it’s serious.

From the video i couldn’t hear any difference from normal bells

I may need to get one of these. It gets very boring very quickly when you’re cycling. I have a specific yell that seems to work when my current bell does not. However, people look quite aggrieved.