A logarithmic unit, not linear
Human ears don't process sound linearly. If sound volume doubled every time air pressure doubled, your ears would explode at a concert or hear nothing in a library. Instead, your auditory system works on a scale modeled by the Decibel.
+3 dB Increase
Doubles the **electrical energy/power** of your signal. Critical when balancing amplifier headroom.
+6 dB Increase
Doubles the **sound pressure level (SPL)** pushing against air and physical microphone diaphragms.
+10 dB Increase
Perceived by the human brain as **exactly twice as loud** as the original source signal.
Threshold Ceiling
85 dB
โ ๏ธ Prolonged Exposure Caution