I recently bought a pair of NC 700 headphones after using QC 35 II for quite some time.
One of the main reasons for me to upgrade has been the claimed superior call quality.
I use them for business calls so speech quality is key.
Unfortunately, this was not the case,
Without using a "trick" (more to follow), my voice is barely intelligible from the other side of the call, resulting in an overall terrible conversation experience!
I made several tests in order to figure out why this behavior (it’s worth noticing that I can perfectly hear the caller’s voice as well as my own voice) and it looks like that NC has a big role in this!
Having a call with NC 10 results in the worse experience (they simply cannot understand what I’m saying), while setting it to 0 results in an overall good one. The same occurs using the "conversation" mode (that simply set NC to 0 as far as I know).
Now the question is: is that by design?
If the answer is yes, well, the whole sense of having an active NC headphone for calls is misleading: one of the main reasons for using an active NC headphone is to be able to have a telephone conversation even in a very noisy environment. But the caller must understand what you’re saying1
If the answer is no, please provide me an explanation.
Of course my headphone is updated at the latest firmware and I’m using iOS devices.