I wouldn’t have thought I had anything beyond normal hearing in quiet environments. Modern life means there’s always some background hum of a refrigerator or an old light or a whining transformer in a wall or in a roof. But apparently I can hear negative decibels so maybe most people don’t hear these things?

If nothing else I’m finding the current journey interesting as I’m having to re-evaluate what is “normal” for both myself and others, for an experience that is obviously very personal and difficult to compare with others.