How come? Noise canceling doesn't mean what you think. It's just a technology that picks up surrounding noise with four microphones and quiets it down. It's a $33 Canyon headpiece + DAF app. Works when you're in most environments. You won't be saying anything important surrounded by car noise anyway. Put one earpiece in one ear— that's it. Works in 90% of social situations. It actually helps with therapy. Most studies show better fluency even after stopping use. You can research.