Hi Nickers,
Its funny you ask that question cuz my DH spends most nights with his head on my belly and he says he can hear baby moving around. He describes it as a bubbly sort of sound, but maybe you can hear baby. I never believed him (but always go along with it cuz I think it's really cute!)
Fortunatly I haven't had belly farts!!!lol But maybe now I might believe hubby
Take care