[hansschouten]

Interesting attack. Reminds me of the DolphinAttack (https://arxiv.org/abs/1708.09537)

[anfractuosity]

Also there's the 'Audio Hotspot Attack' - https://ieeexplore.ieee.org/document/8906174

Which uses a parametric speaker, which uses a number of ultrasonic transducers which "emit amplitude-modulated ultrasounds that will be self-demodulated in the air"