That's why I was looking for a headset with Noise Canceling.
From Noise Canceling I'm a little disappointed. The MDR-ZX750BNB has according to the manual from which he selects the most suitable in his opinion three modes when prompted. What the individual modes do now precisely and thus I could not figure out different today. For a retracting in the Vienna Metro station you have in any case no order. The only solution before pressing pause or rewind afterwards. But constant background noise such as the low hum are very well hidden. Loud conversations in the immediate vicinity you can, unfortunately, "drown" only volume.
Outdoors it is recommended that the Noise Canceling switch off. Wind noises are in fact only partially filtered and otherwise by the microphones which analyze the ambient noise transmitted into the headphones. A stiff breeze is therefore much quieter without Noise Canceling. Is too much wind whistles through his headphones edges unfortunately itself. Cycling I'll never order.
I find the headphones are quite comfortable to wear and can not understand at all pertinent complaints. But maybe I'm not as sensitive as others.
The Bluetooth pairing went without any problems with my Nexus devices and operating properly. What was surprising was the fact that the my telephone when used as a Bluetooth transmitter for this headset battery lasts much longer than for passive in-ear plugs I've used before for me.
As I said I am satisfied and I never once thought to return the headphones. The 5 star there would be if there was 100% Noise Canceling. And when no external edges would bring to the wind whistling.