MacBook with T2 chip found to be equipped with 'the strongest ever' microphone eavesdropping mechanism

On the midnight of October 30, 2018 in Japan time, the new "MacBook Air" was announced in the event held by Apple. This model is equipped with "T2 chip" with high security capability, but the book type Mac released in 2018 is a scheme to prevent eavesdropping by a more reliable way "to physically separate the microphone" It is clear that it is adopted.

Apple's new T2 security chip will prevent prevent hackers from eavesdropping on your microphone | TechCrunch
https://techcrunch.com/2018/10/30/apple-t2-security-chip-microphone-eavesdropping/

Apple's choice of "revolutionary (?) Way to physically isolate the microphone" to realize the purpose of disabling the microphone to prevent eavesdropping means that the company's newly released document "Apple T2 Security Chip Overview ".

(PDF file) Apple_T2_Security_Chip_Overview

If you turn over the page and look through the table of contents, you will find an interesting heading "Hardware microphone disconnect" (Hardware microphone disconnect) in "Page 13".

On page 13, short sentences are written as shown in the image below. "There is a feature that all the portable version Mac with the Apple T2 security chip has the function that the microphone is invalidated whenever the panel is closed.This disconnection is realized only by a hardware mechanism Yes, so any software, including root and privileged kernel, and even software implemented on the T2 chip, will not be able to access the microphone when the panel is closed (the camera will not be disconnected). This is because the field of vision of the camera is completely obstructed when the panel is closed) ".

Apple has increased the security of the device by installing T2 chip with high security function, but it turns out that the new MacBook has adopted a mechanism to prevent the microphone from being used by force technique. While the importance of "how to prevent hacking" is emphasized, blocking access physically may actually be said to be the strongest security measure.

Mac computer with Apple T2 chip - Apple support
https://support.apple.com/en-US/HT208862