How loud does a sound have to be to break stuff?

Let's say we're trying to break a glass wine under 30 seconds with pure sound. Let's also assume that the sound we're emitting perfectly matches the glass's frequency (resonance). Approximately, how loud should the sound be in db? Maybe 100?

Another question: Do small, handheld electronics like iPhone or Nintendo 3DS break easily from sound like glass does?

It would have to be a LOUD SCREACH like a little girl going AHH times 10

Your ears would pop kid

Energy density = 0.5*K*strain²
amplitude² =