0 dB does not mean no sound, it means a sound level where the sound pressure is equal to that of the reference level. This is a small pressure, but not zero. It is also possible to have negative sound levels: - 20 dB would mean a sound with pressure 10 times smaller than the reference pressure, ie 2 μPa.

Please don't fucking post here until you get good.

>>54485244
I'm just trying to get an idea of how loud my PC is in decibels.
How can I convert this -54db so that it relates to this list here: http://www.industrialnoisecontrol.com/comparative-noise-examples.htm ?

>>54485280
You are an idiot. Google what a db is.
It's a log scale. 0 doesn't mean no sound

>>54485280
nice bait, but you'll not fool me into this shit.

>>54485280
You can't. It depends on so many factors, amplification, impedance of your speakers, your room etc. The only way to measure absolute sound pressure is with a standardized device.

>>54485337
So what's the point in those sound meter apps on smartphones?

>>54485345
retard bait

>>54485345
Theoretically you know the signal path in a smart phone, so you could convert the PCM data from the mic into absolute sound pressure.

Don't know whether that's in any way reliable though. Probably not.