This root form (lemma) is used in 2 different forms in the NT: φθόγγοις (DMP), φθόγγος (NMS).
It is glossed in 2 different ways: ‘sounds’, ‘voice’.
OET ROM 10:18 Greek word=φθόγγος (fthongos) Morphology=NMS English gloss=‘voice’ SR GNT ROM 10:18 word 13
OET 1COR 14:7 Greek word=φθόγγοις (fthongois) Morphology=DMP English gloss=‘sounds’ SR GNT 1COR 14:7 word 13