You'll have to speak louder—I can't hear you.

你得说大声点—我听不见你的话。

《牛津词典》

Can't you hear that I speak and think as you do?

难道你听不见我说话和思考的方式和你一样吗？

youdao

Could you please speak a little louder? I can't hear you very well.

你能说大声一点吗？我听不太清楚。

youdao