Failed 4th hearing test

My baby boy is 2 months old now. He failed his first 2 hearing screens in his left ear when he was born and then again when he was a month old and just failed the 4th one last week. The audiologist said he hears sounds but failed the low frequency ones. He definatly hears tho because everytime daddy coughs or sneezes it wakes him up lol. Just wondering if any mommas went through this and if so what was the outcome?

Pic of my handsome boy cuz hes so adorable😊😊