The voice and music recordings they used in their demonstrations were also louder than the average human conversation, with speakers turned to their maximum volume
I can clearly see vibrations in glass near loud speakers with my naked eye, but when someone is speaking I generally can't see any vibrations. Still really cool that they were able to reproduce sounds this way, but it's not like you can spend 1k and be able to actually listen to conversations using this method.
If their chart is correct, the 30cm mirror show a 20db improvement in SNR at 200Hz compared to 20cm, same curve but 20db lower gain.
That is an absolute crazy scaling, I'm not entirely sure how that's possible, though I have a suspicion. If it's an actual scaling law that can be exploited, I would expect you can extend this to entirely practical audio volumes on a shoestring budget.
The voice and music recordings they used in their demonstrations were also louder than the average human conversation, with speakers turned to their maximum volume
I can clearly see vibrations in glass near loud speakers with my naked eye, but when someone is speaking I generally can't see any vibrations. Still really cool that they were able to reproduce sounds this way, but it's not like you can spend 1k and be able to actually listen to conversations using this method.