What would make my belch be higher pitched than usual?

Question

I was sick the other day, with a stomach ache and it was making me belch a lot but they were strangely high pitched, almost like when you inhale helium and your speach is high pitched. What could that have been? I assume that I ate something that was producing a gas that was making me feel sick but was also making this strange effect. Any ideas?

Answer 1

there are several known factors that affect the pitch of
all oral sounds. These include:
1. tightness/looseness of the vocal chords
2. the size of the resonating cavities involved

With belches, unlike typical speech, the esophagus and
upper stomach area can get involved as a resonating cavity
where, usually with most speech, the cavities are the lungs,
throat, nasal passages and sinus areas and the mouth.
most people belch and use stomach resonation to get that
lower pitched burpy sound.

3. the medium (like air versus helium) they resonate in

I wonder if you had a stomach ache, if perhaps your stomach
was swollen by being filled with other stuff (meds, food, water) or otherwise changed its size or shape?

Answer 2

Maybe your esophagus was swollen, creating a smaller opening.