system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can the quietest room in the world be -9 decibels?

This is just very confusing for me.  Would the sound be effected before it was created?
gpt
Decibels are a logarithmic scale. 0 isn't no sound, it's just the lower-limit of what a human can typically hear. So -9 isn't no sound at all, it's just quieter than the quietest sound a human can detect, by a factor about the same as the factor between 0 decibels and 10.