How would you secure this? Also, consider techniques like following: https://news.mit.edu/2014/algorithm-recovers-speech-from-vibrations-0804 https://news.mit.e

How would you secure this? Also, consider techniques like following: https://news.mit.edu/2014/algorithm-recovers-speech-from-vibrations-0804 https://news.mit.edu/2014/algorithm-recovers-speech-from-vib..., which can leak audio information much farther than audio range.