Negative amplitude means the signal is attenuated relative to a reference point, so if you see e.g. -20dB, it means the signal is 1/10th of the reference value. dB on it's own is unitless, so you will see things like dBm (relative to 1mW â 0dB = 1mW), or dBV (relative to 1V â 0dB = 1V).
In Colorado, the offer is valid at the Denver Zoo and the Denver Art Museum. However, the Denver Art Museum is Sunday only, because they already offer free admission to everyone on the first Saturday of the month. This list does change, so check the Museums on Us website, before you go.
1 Denver site could be first in Colorado to receive historic recognition for role in LGBT rights movement. 2  One-Day FREE Paint Collection Event on Saturday, August 27, 2016. 3  Police Department Ready to Collect Demographic Data.  Mayor Hancock Invites Residents to Join in Final Weekend of Denver Days 2016.