Going 35-45kmh, most of what you hear is wind. Cars approaching 80kmh and beyond on a country rode. Garmin warns me 5+ seconds before the car passes me. I hear the car usually around 1s before it does (if that). Listening music (bone conducting) amplifies this.

You find the bone amplifying music works in wind? I figure it just adds more noise? Always tempted… its better than in ear for sure for safety.

it works most of the times. Unless its super windy, it's enough to make a long ride more pleasurable with tunes for motivation/boost. I can't listen podcasts on them as I can't make out the individual words. It's better than the alternatives.

For running they're much better!

What sort of cycling do you do?

Coupd that make hearing cars easier somehow?

The Caria is good in noisy situations or with multiple cars approaching. Unusually fast car approach get an extra alert.

I have used it with headphones but usually don’t. You detect the cars far earlier than you do by hearing them.