-DECIBEL REFERENCES- - -KINGDOM OF JOGA-

-as of [13 JULY 2025]-

-OVERVIEW-

-MEASURES [RATIOS]-

(not just “sound pressure”)

(it can also be used to measure “electronic signals”)

(and many other variables)

-“SOUND INTENSITY” IS MEASURED IN [DECI-BELS]-

-“SOUND POWER” IS MEASURED IN “WATTS”-

-THE [WATT]-

-“SOUND PRESSURE” IS MEASURED IN “PASCALS”-

-THE [PASCAL]-

(WHEN WORKING WITH AUDIO, “DECIBEL METERS” ARE USUALLY MEASURING RATIO OF “SOUND PRESSURE”)

-THE [LOWER THRESHOLD] OF [HUMAN HEARING] IS [20 MICRO-PASCALS]-

-THIS VALUE IS USED AS [DENOMINATOR] OF YOUR [PRESSURE RATIO]-

*PRESSURE RATIO* —>

(IN “MICRO-PASCALS”)

-[CURRENT PRESSURE] / [20]-

*DECIBELS* —>

-[log(pressure ratio) x 20]-

-the “bel” is named after “alexander graham bell”-

-it was developed at “bell laboratories”-

-presented in 1924-

(2 years after bell’s death)

*ALEXANDER GRAHAM BELL* —>

(1847 – 1922)

-SCOTTISH INVENTOR OF THE [TELEPHONE]-

-the decibel (dB) is 1/10 of a ‘bel’-

*the bel (B) is ¹⁄₂ ln(10) nepers*

1 B = ¹⁄₂ ln(10) Np

ln(10) = [~2.3026]

-[1 bel] = [1.1513 nepers]

*JOHN NAPIER* —>

(1550 – 1617)

-SCOTTISH MATHEMATICIAN-

-“DISCOVERED” LOGARITHMS-

-THE [NEPER]-

*the ‘neper’ is the ‘change’ in the ‘level’ of a ‘root-power quantity’ when the ‘root-power quantity’ changes by a factor of e* –>

(that is 1 Np = ln(e) = 1)

-the “sound power” is proportional to the “square” of a “root-power quantity”-

💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘

*🌈✨ *TABLE OF CONTENTS* ✨🌷*

🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥