Kissingfrogs Lots of what you have posted above is like my DS too.
He passed his newborn hearing test, tho they were done when he was 2 weeks old (he was born at home) and i do recall it taking a while for them do to the test, but i think (cant actually full remember) it was because he kept waking up.
DS will talk to most people, but what he says lots of the time make little sense to most people, although just in the last few months we have a lots of improvements. We have got better at understanding him and he uses a mix of makaton and gestures, which helps lots, id say we'd gone from not understanding him 70% of the time to understanding him 70% of the time. I think starting nursery has helped as he has to try harder, but how exhausting must all this be for him?
. He does actually say every morning onroute, no Mummy i tired!! no nursery!
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He too also makes is own words up for almost 12 months when he wanted a drink he would say ma-ma-mar which actually meant drink/juice!! I think he heard one of my DDs say Mum i want more!. Dat-tay was another, which actually meant ambulance!......never did figure out how he'd come to call it that. There has been lots of others and ones we never actually figure out what he is saying, the he will say the same sound over and over.........no wonder he tantrums (and hits, bites, kicks ect!! ect!!) like no other child ive ever met!......and i have a daughter with an ASD!!! so i know the difference between a paddy and meltdown 
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Can i just ask how did they know when they tested your DD that her hearing test was not just down to glue ear at what point in the testing was the sensorineural hearing loss picked up?, did the pressure test show the glue ear?. We are hoping that DS hearing loss is just down to the glue, but we wont know for sure until we see ENT.
Trace Hows your DD today? hope you managed a good night xx