Rory, a good question, will have to wait until my next bout but I think it's mainly inhalation that I hear the wheeze.
Saw my GP and he looked through medical history and listened to my symptoms. Did a spirometry test and scored 600, last year it was 450.
From my symptoms he doesn't think I have asthma.
Got an inhaler to use for a couple of nights before sleeping and then as needed over a two week period. Got to keep a diary for those two weeks to monitor its usage.
So we'll see.