...or I might not care about persuading or being persuaded, as much as seeing an improved perspective reveal itself to both of us. It's the difference between dialog and discourse.
Even if the manufacturer just picked the cheapest possible dinging bell sound, that's also going to persuade you of something even if the manufacturer had no intention to persuade you. That would be passive, unintended persuasion, which we do constantly.
A microwave's tone could be chosen by the manufacturer to signify quality, true. However the primary meaning of the ding itself, to me is that it is signalling that my timer has run out and I might want to attend to it. Persuasion does not seem like the right word.