The decibel explained! dB SPL (sound pressure level) and dBFS - Ep. 02

What actually are decibels and how do we interpret them? How do we perceive pressure? What are dB SPL and dBFS? If you're not familiarized with any concept used in this video, watch my previous video (link further below) where I explain concepts from a beginner level.

Previous video with basic concepts of acoustics: https://www.youtube.com/watch?v=4_PIxS4A0cU&list=PLa-whSjdwzxGD-juVFGo4yA4E8VmmpRZ-&index=1&ab_channel=AwesomeAcousticsinEnglish

Complete classic series: https://www.youtube.com/playlist?list=PLc6BlWWbxqOL-Ow1UTRXvCt5w7mCbK0_f

Version en Español de este video: https://www.youtube.com/watch?v=5qtPcGqbxdI&list=PLc6BlWWbxqOI9xvXoMedLb8e3KLdk1YZG

Music: Ricardo de Santiago – A Beautiful Chaos (https://www.youtube.com/watch?v=gaY2evygcVI)

0:00 Intro
0:21 Usefulness and purpose of decibels
0:59 Logarithms
1:53 Decibels for amplitude and power
2:42 Reference of decibels
3:08 Decibels SPL (sound pressure level)
3:35 Minimum audible pressure and "micro" prefix
4:07 SPL scale vs. pressure scale
4:28 Sound levels, hearing damage, and pain threshold
5:33 Sensitivity curve of the human ear
6:41 Linear scale vs. logarithmic scale
7:14 Logarithmic perception of pressure
9:27 Decibels Volt
10:03 Digital amplitudes
10:34 Decibels full-scale
11:13 Clipping
11:44 Decibels in audio and video software
12:37 Decibels in amplification context
13:33 Linear multiplications vs. sums of decibels
15:08 Doubling of power vs. amplitude
16:00 Logarithmic axes
17:47 Outro