I'm sorry I was an asshole about it.  The point is that the vowels in man and noun are raised in AusE according to Felicity Cox (2005), and the phonetic transcription for that IDEA example I gave you transcribes man as , and indeed it sounds like that to my ears, although that speaker did seem a bit broad.  It's not that uncommon for vowels to be raised before nasals.  Take for example the pin-pen merger in Southern American English and in southwestern Ireland or the non-phonemic æ-tensing that takes place in accents that have undergone the Northern cities vowel shift.  The only reason I brought this up is because I imagine it is very noticeable to English ears (it's even noticeable to my American ears).  Many English people might pronounce man as , which sounds quite a bit different from .  You're the Aussie here, so I'm sure you can verify this by simply contrasting your man with your bad (in this case both would have a long vowel, so try to listen for the quality of the vowels) or your noun with your loud.  This is just another little thing that distinguishes Aussie English from English English; that's all.