Commentary for Rosh Hashanah 56:6

But [a case] where the hearer had intent, but the sounder did not have intent, how is that found?: He could not find to say, such that the sounder did not have intent to have the listener fulfill [his obligation] - as [this baraita] implied to him the same as that which [the Gemara] inferred at the end of the discussion: [The sounder] sounds for himself, like [the hearer] hears for himself. Hence he does not require intention.