The headphones are comfortable, adhere very well to the head, and you can hear the change when the function is activated noise, it's pretty impressive. In noise mode, the +/- buttons on the headphones allow you to adjust the sound volume, it is convenient.
It is indeed a noise reduction, but not a complete removal: you always understand the person in the room and talking to you, you will always hear the muted sound of the engine in the car, etc .. .
When activated, I feel like a kind of whistle, certainly very low, but that bothers me in the long run.
The button to activate / deactivate the noise canceling mode is inaccessible (you have to remove the headphones and switch a headset to access). In passive mode, this is a normal helmet and it is not possible to adjust the sound level.
Finally we would have had to find a system to put the cable to the headphone of choice, because it's not always practical to have it always on the same side, it depends on what you do at the time. Otherwise it is long enough to not be a nuisance.
