This is fun research, but it's basically just a microphone (which works by turning these vibrations into magnetic pulses that generate electric pulses) using a

This is fun research, but it's basically just a microphone (which works by turning these vibrations into magnetic pulses that generate electric pulses) using a much, much more complex signal processing mechanism (observing photons bouncing off the vibrating surface, translating the digital representation of those photons into a digital simulation of the electric pulses a microphone would generate, and turning that digital simulation into real electric pulses).