https://techcrunch.com/2018/10/30/apple-t2-security-chip-microphone-eavesdropping/

Apple’s newest MacBooks include a new feature that makes it virtually impossible for hackers or spies to eavesdrop on your microphone.

Buried in Apple’s latest range of MacBooks — including the MacBook Pro out earlier this year and the just-announced MacBook Air — is the new T2 security chip, which helps protect the device’s encryption keys, storage, fingerprint data and secure boot features.