Do you know anything about what you are talking about?
Buffer overruns and similar attacks (e.g. mal-formed pictures) require you to actually get the have the PC do something with the data that is subject to a lack of validation. That is simply not possible with a sound system bar, perhaps, voice-to-text-to-command conversion which is hardly likely.
Same for other routes, to actually inject data to a system that is not expecting it (wired network, USB cable, etc) needs a LOT of energy, not something that is going to go unnoticed and not something you will get from a mobile phone meters away.
First time I got an ESD test gun I did the obvious - ignored the instructions, wound it up to maximum (above 18kV) and tried it on my PC. It was fine, but I crashed an old (pre-EMC regulations) PC in the adjacent office.
To do so took a lot of peak power, and it is virtually impossible to induce such a crash in a controlled manner to exploit it. It is not like a buffer overrun where you can inject code in a specific place, you induce data/address corruption in a GHz clocked PC and you have no idea of just where it is going to bork at.