Hello municipality, I asked a similar question some time ago, but still here still an attempt. I use the hands-free device installed in the C70 II Facelift Momentum as standard, i.e. I couple the mobile phone via Bluetooth. My interlocutors complain sadly that they understand me only with a lot of background noise and that the conversation for them is therefore very exhausting and unpleasant – and that already at country roads tempo. I think the car is “developed” and it is not a question of any software noise suppression tricks. Rather, it should be banal physics that passes through wind noise or vibrations to the microphone. I suppose it is contained in the plastic part, in which the indoor lighting lights and switches also slumber?! Has someone ever seen the a special “insulation” around the micro installed in self-direction? Thank you and best regards, Cesevenzig