Another such theory, but much less generally accepted, is Winfred P. Lehmann's view, on the basis of inconsistent reflexes in Hittite, that *h₁ was actually two separate sounds.
还有一种类似的但接受度小得多的理论，是 Winfred P. Lehmann 的觀點，基于赫梯語中有不一致反映的基礎上，認為 *h₁ 實際上是兩個獨立的語音。