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The Science of Stink
Biology, chemistry, and acoustics team up to explain a universal soundtrack.
Gas Composition
Mostly nitrogen and carbon dioxide, with hydrogen and methane in some folks, and sulfur traces doing the heavy lifting on odor.
Microbiome Dynamics
Fiber feeds microbes; microbes make gas. Tolerance to lactose and FODMAPs changes the chorus.
Acoustic Variables
Pitch and volume depend on pressure, aperture tension, and body resonance. Physics… with vibes.
Peek at the gas collection apparatus from the 1800s.