MaGG
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I was reading up and was looking particularly at negative decibel readings [ie: -20dB] and realized that 0 dB doesn't actually mean no sound, but means:
Quote:
So negative dB ratings therefore mean:
Quote:
So, if negative/zero doesn't actually mean no sound, then what's the designation for something that doesn't have any sound, since zero is taken?
Source for quotes: http://www.phys.unsw.edu.au/~jw/dB.html
Quote:
a sound level where the sound pressure is equal to that of the reference level. This is a small pressure, but not zero |
So negative dB ratings therefore mean:
Quote:
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 micropascals. |
So, if negative/zero doesn't actually mean no sound, then what's the designation for something that doesn't have any sound, since zero is taken?
Source for quotes: http://www.phys.unsw.edu.au/~jw/dB.html