L.N.
i agree with having his hearing checked. we had the same experience though my child at 18 months was recommended speech therapy as she had expressive and receptive language delays. after 9 months she scored above the average for her age. i was also faced with 'she'll talk when she's ready to talk,' although i didn't let that stop me from having this ball started. i am glad i did. she still eats a few sounds now at the age of 3 and still has nowhere the language skills her sister has but she talks and understands me to my satisfaction. that said, speech therapy and having her hearing checked was the best thing i did for her.
so don't be afraid. contact the pediatrician have him/her recommend a good/best audiologist and take it from there.
good luck