In due respect, i went in the old North and it was often very quiet. Perhaps you are older than me and remember the 70's glory days but i remember it in the mid 80's.
And notice I said louder. The old North always sung a fair bit but often there were only a few hundred joining in.
Not the noisiest part of the ground I'll grant, but in the east lower toward the north, there is plenty of atmosphere. Better than any part of the Goldstone Ground and often louder than the old north there. A lot of the Withdean crowd who had kids had first dibs on tickets when the amex opened...