YOU SAID:
he moaned at least this loud
INTO JAPANESE
彼は、少なくともこの大声でうめき声
BACK INTO ENGLISH
He has at least this loud moan groan
INTO JAPANESE
彼は、少なくともこの大声でうめくうなり
BACK INTO ENGLISH
He has at least this loud moan groan
That didn't even make that much sense in English.