Yes, definitely get an audiology exam for hearing. My hearing impaired son has done very, very well with piano lessons. Getting your child into music can be a great idea. If it really pans out, you can also look into an FM system- the teacher wears a microphone and it transmits their voice across the room to a speaker on your child's desk. It goes into my son's hearing aid, which is cool. That reduces the noise to signal ratio.