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.
Zoo admission is free for organized school groups Monday-Thursday, 9:00 a.m. â 3:00 p.m. for students up to age nineteen from schools within the corporate limits of the City of Houston. Complete and plan your day by visiting our Field Trips page.or just $4 per ticket (child and adult), guests currently enrolled in the Lone Star program can purchase up to two (2) adult and three (3) childrenâs tickets per day. This is a 75% discount off of regularly prices admission tickets.