When following the Hebrew text, יבב corresponds to making a תרועה blast as opposed to tqˁ = תקע, which appears to be the more general term for any kind of sounding of the horn.
In the biblical contexts narrating the sounds of war, it is difficult to know whether the Aramaic translators/scribes understood thus word to refer to a trumpet or an oral sound.
Note that the Dt forms explicitly render a biblical hithpa'el.