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What are Decibels and why are 3dB and dBm important?
A Quick Look at Decibels
Why -3dB? (An alternate approach to explaining dBs)
Decibels (dB) In Audio | The 5 Things You NEED To Know...
Fast Easy Guide to Decibels dB vs dBi in 6 Minutes
Decibels made simple in 5 minutes
What is the significance of -3dB? (4 Solutions!!)
Understanding dB Math
Ham Radio Basics--Decibels in Five Minutes
12 - Understanding Signal Strength in mW and dBm
Sound bites - 3db rule
Explaining the dB Scale