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.
Let's work together! Join our Earth Day Party for the Planet April 22-23 when we will have lots of fun conservation-themed activities for the entire family. Even better, you can Go Green to Save Green. Get $5 off zoo admission by bringing in one gently used football, soccer ball, basketball, muffin tin or basket.