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.
Free Events Have fun without spending a dime. Best Fests Can't miss events this spring. Big Weekend. Come for the Reds, Stay for Zoo Blooms Thu, Apr 13 to Sun, Apr 16. Spring is in the air when you can pair a baseball game with Cincinnati Zoo's annual Zoo Blooms event. Planning Tools Free Visitors Guide Download or order your copy today!