I would definitely recommend having him monitored by an audiologist for his hearing loss. For his speech, though, I’d recommend being evaluated by a speech-language pathologist to see if they have concerns, or believe he may need intervention.
Adrianna Sulaica, Au.D., CCC-A
Regarding the hearing loss, is it conductive or sensorineural hearing loss? Because a lot of the sounds we imitate come from what we hear, hearing difficulty can impact how he is interpreting the sounds and what he says subsequently. Has he been to an audiologist yet for a follow up? My recommendation to you at this time is for him to see a pediatric audiologist and potential speech language pathologist for an evaluation and aural rehabilitation, if appropriate.
Hope that helped. Have a great day!