Just make up some shit about how the wine changes the resonance frequency of the glass somehow, then brag about how knowledgeable you are until they go away.
I make home-fermented ginger beer and no shit, Lemmy Shitposters, I can tell when it's done by listening to it, it hisses. My husband laughs at me because I will lean down with my ear to the pitcher, but it's the easiest way to tell.
And if they ask explain to them that the ears are connected to the throat by the eustacian tubes and the throat is connected to the sinuses that are connected to the nose.