English to Italian Other psicoanalisi

sarà una domanda stupida e pignola, ma secondo voi qui "strong voice" pende più dalla parte di "voce dura" o di "voce grossa"?

At that point, I grew impatient, and in a strong voice told her that she was talking sheer nonsense, and that she knew it perfectly well. I illustrated, point by point, in what way she had just distorted everything that I had just said, interrupting her as loudly as she would interrupt me while I was trying to say this.

grazie anche per l'aiuto nella divinazione :)