Andrew had an inconclusive "newborn hearing test" just before he was discharged (so at full-term, as he was discharged 2 days after DD). He went back to have the same style of testing - whilst still/asleep - a month or two later (sorry, can't remember, brain like a sieve!) and the test showed that his brain was not responding in the expected way to sounds played into his ears. From this they surmised that the problem was probably with his auditory nerve, hence the diagnosis of ANSD.
Nothing happened other than a recommendation to start using baby-signing for about five months, when he started to return to hospital for behavioural testing - this is where he's awake, they play sounds, and look for signs of response. I found this type of testing incredibly frustrating! They play a sound on one side and if he turns to seek the source of the sound, a hidden dancing puppet is displayed as a reward. Problem is that even when he is facing said puppet, he's not interested in it, it's boring & old-fashioned to him! He failed miserably at the behavioural tests therefore, partly due to their useless testing system, but mainly due to his delayed development anyway.
In August he was given hearing aids for the first time, set at an "average" level. We lasted a month before giving up on the trial - he still wasn't even sitting up at that point, so it was difficult to assess whether he was hearing any more as a result of the aids, which he kept pulling out.
We decided to wait until December to try again, and Andrew has come on leaps & bounds with his physical development (sitting, crawling, pulling himself up to standing). Today he got his hearing aids again, set at a slightly lower level (65dB). He still wasn't interested in the puppets, but he was searching for the source of the test sounds and noticeably "stilling" when a sound was played.
Despite all the above, we (as parents) feel that Andrew has a better level of hearing than the tests would suggest - he's just bloody-minded! Sometimes he will hear us call him across a room, other times he won't; sometimes he startles to loud noises, other times not. We wonder whether his time on NICU (3 months) conditioned him into being in his own little world, shutting out external factors including noise.
Anyway, that was all a bit of a ramble! I'd be interested to hear how Cam's hearing tests progress, so please keep me posted.