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.
This spring break and summer, your little one will enjoy tours through the Zoo, outdoor play and activities, themed arts and crafts, close-up animal encounters and more! Learn more and register now. Penguin Days are back! Colder temperatures bring cooler prices to the Dallas Zoo with $7 admission, now through Feb. 28. Bundle up, beat the crowds and come visit us soon. Get more details here. Dallas Zoo Membership Dallas Zoo members get free admission, free parking, member-only events, and more! Join today for a full year of adventures. Join today!