valve amplifiers and high efficiency speakers
 
search

Berekenen van versterking (gain) en demping (loss)

Enter two values and press the desired calculate bar
Input:voltagepower        
           
input   value 1    
output   value 2    
level change   dB        

For now, we deal only with 'voltage' amplification (gain) and damping (loss).
gain and loss - sengpielaudio
V2 >V 1 = amplification, dB value is positive and V 2< V 1 = damping, dB value is negative.
V2 / V1 means the ratio. The amplification or the damping in dB is:
L = 20 × log (voltage ratio V 2 / V 1)         V 1 is the reference.

 3 dB ≡  1.414 fold the voltage  - 3 dB ≡  damping to the value 0.707
 6 dB ≡          2 fold the voltage  - 6 dB ≡  damping to the value 0.5
10 dB ≡  3.162 fold the voltage  -10 dB ≡  damping to the value 0.316
20 dB ≡       10 fold the voltage     -20 dB ≡  damping to the value 0.1

Using voltage we get: Level in dB: L = 20 × log (voltage ratio)

  +6 dB = two fold the voltage
+12 dB = four fold the voltage
+20 dB = ten fold the voltage
+40 dB = hundred fold the voltage

Using power we get: Level in dB: L = 10 × log (power ratio)

  +3 dB = two fold the power
  +6 dB = four fold the power
+10 dB = ten fold the power
+20 dB = hundred fold the power

Bron: Sengpielaudio.com

*

_______________