Moving on to the next part, Noise-Cancelling. From my test, the WH-1000XM3 managed to successfully beat the rest. With its advanced sense engine and noise-cancelling processor, it offers the best Adaptive Sound Control as well as Atmospheric Pressure Optimizing. Adaptive Sound Control, which is offered on all 3 models, allows for toggling of different noise-cancelling modes like Walking, Staying, Transport and Running. Each has different levels of noise-cancelling and ambient sound mode. These are all automatically detected by the headphone itself. Users can toggle the amount of ambient sound let in, focus on voice-only or just turn it off completely. Atmospheric Pressure Optimizing is another feature that helps to optimize the noise-cancelling to fit different environments such as in an aeroplane or on the ground. However, it is only available on the WH-1000XM3. The WH-H910N is next in line for noise-cancelling. It works well at cutting high frequencies but it is definitely not as effective. Lastly, the WH-XB900N works well too, however, it did not beat the rest since it did not cut off as much higher frequency noises. It is worth knowing that all 3 headphones have quick attention mode which allows you to hear announcements or talk to someone quickly without taking out your headphones.