700 NC - How to use Noise Cancellation only
For the NC 700 the manual mentions this functionality (p. 34):
USE NOISE CANCELLATION ONLY
Clear away noisy distractions without audio. Focus on what matters most — your work or whatever your passion.
1. Press and hold the Power/Bluetooth button until you hear a voice prompt. Your mobile device(s) disconnects and all audio stops playing.
2. Set your preferred noise cancelling level (see page 32).
This sounds great but how is this supposed to work? If I tap the button they switch on or off. If I hold it the voice prompt is "ready to connect another device" and the headphones go to pairing mode.
I want to use them just with ANC without my Bluetooth devices (for example in planes). But if you switch them on and no device is near they start searching for all devices that have been paired (and annoyingly announce so repeatedly) and then go to pairing mode.