Well intrusive seems quite a reasonable adjective to use. I suppose it depends on what you are used to, where you are and what you are doing.
Is it me or does aircraft noise become more objectionable as one grows older? I've become a grumpy old man of late, roundly cursing the Yanks and their after-burning F15s as they rocket around the skies about here, so bloody anti-social! They are without a doubt intrusive.
Certainly the Emirates 380 afternoon service from Manchester to Dubai often makes a good old noise just before reaching top of climb over the North Sea here in North Norfolk, enough to make you look up. We see up to twenty helicopter transits a day; after twenty years one ceases to notice them.
Para-motors - don't get me started!