My late mother could freeze a whole supermarket with a belch! Everyone stopped what they were doing to look for the source of the noise (I would loved to have obtained a volume of measurement....). As I would have been pushing her wheelchair, I couldn't pretend that she was nothing to do with me!
However, as Aonk mentioned above, some comments here are sad.
As embarrassed as I was, I understood that my mother could not help herself. Would someone want to make such an awful noise in public? She was as mortified as I was.
As Maybee mentions above, the *Know your s*t programme - on television earlier this week - showcased someone with a similar affliction (although I would bet my little old frail mother's efforts would trump anyone else's!).
These gigantic belches are not a matter of a burb not being suppressed because the person couldn't be bothered but a genuine medical problem. If you should hear a very loud belch, please be a little more sympathetic!
I just hope this is not an inherited condition.......!