Probably not. It's not rocket science. There's even open-source implementations [1, 2] that can do it for you. Basically you take two microphones, one close to

Probably not. It's not rocket science. There's even open-source implementations [1, 2] that can do it for you. Basically you take two microphones, one close to the mouth and one farther away, and try to compute the difference. I have no idea why it's not there. I'm quite baffled, actually. [1]: https://github.com/wangwei2009/coherence https://github.com/wangwei2009/coherence [2]: https://github.com/SIP-Lab/iOS-TwoExternalMics https://github.com/SIP-Lab/iOS-TwoExternalMics