Coffee Degassing Valve: CO2 Offgassing, Cracking Pressure and Oxygen Barrier
How a one way degassing valve vents roasted coffee CO2 offgassing at 2.5–6.5 mbar, blocks oxygen ingress, and why sniffing a valve does not measure cup flavor.
#smell
Retronasal Olfaction vs Orthonasal Aroma Release
Separate external sniffing from aroma reaching the nose during eating, and see why food aroma release and perceived intensity can move in different directions.
Smell is not the same sense as taste
Two wine explainers separate smell at the nose, smell from the mouth, and five tastes. They do not diagnose smell loss.