adding to this. I lost my hearing at age 2, in 1987. It took quite some time before my parents could find an audiologist that could properly assess my hearing loss levels in such a young child. I was almost 3 when I finally got my first set of hearing aids. There was a lot of driving around to different towns and audiologists/clinics before finally the Audiology Center at the University of Wyoming tested me and determined the severity of my hearing loss. Technology plays a big part in this. Now, technology is readily available for testing and immediate fitting of hearing aids; back then not so. My parents knew I wasn't hearing, my speech was diminishing (I was able to speak in full sentences before becoming ill with meningitis and going deaf from that), and they had a hell of a time finding someone who could help and work with us.
I am going by what teacherofthedeaf said, and say I was peri-lingually deaf. I was in the process of learning language when I went deaf and my language started vanishing after the fact. Peri-lingual makes the most sense for me, and didn't even know this term existed. I knew of pre- and post-, but neither one applies to me. I NEVER considered myself late-deafened, as I feel that term is more for those who grew up with hearing and then became deaf as an adult.
Also adding onto DeafDucky's last post - I was 100% profoundly deaf in my left ear after the meningitis (severe-profound range for right ear). I wore hearing aids in both ears, but never benefitted from having one in the left ear. So I only had the little residual hearing in my right ear + hearing aid to get by all this time. Around 4th grade, I was allowed to stop wearing the left hearing aid after I made my case (I can't hear anything with the left hearing aid, why continue wearing it and wasting money on maintenance of left hearing aid when it's not useful?). Little did I know the school district audiologist REALLY wanted me to keep the hearing aid on to keep stimulating whatever in that ear, in case I should take advantage of newer technology in the future (i.e. cochlear implants). From 4th grade and on, I only wore 1 hearing aid.
Even now as an adult, and both ears being 100% profoundly deaf (CI surgery in right ear destroyed what little hearing I had left), I still consider myself 'deaf', not 'Deaf'. My choice on how I identify myself.