Amping and amplification in dB gain voltage power - sengpielaudio
 
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The reinforcement and also the amplification factor are called simply "gain" and its increase value with
amplification is positively designated. Loss or decrease is the damping factor,"negative gain" or also
"attenuation". Field and power gain factors and loss factors are ratios.
 
Conversion
 
● Field quantities: e. g. Voltage  Gain and Loss ●
0 dB damping and 0 dB amplification belong to the factor 1
 
Enter the value for V in and V out and press the "=" key.

 
Level Lfield = 20 × log10 ( V out ) dB gain
-------- ---------------
V in
"V in" is the reference value    
 

Gain und Loss - sengpielaudio

● Power quantities: e. g. Power Gain and Loss) ●

Enter the value for P in and P out and press the "=" key.

 
Level Lpower = 10 × log10 ( P out ) dB gain
-------- ---------------
P in
"P in" is the reference value    
 

Gain und Loss - sengpielaudio

Enter a value in the left or right box.
The calculator works in both directions of the ↔ sign.

Field Quantity:

 
Voltage V:
volt		  ↔  Voltage level LU:
dBV
V = V_0 \cdot 10^\frac{L_V}{20} \ \mbox{volts}   L_V = 20\, \log_{10}\left(\frac{V}{V_0}\right) \ \mbox{dBV}
Reference voltage V0 = 1 volt (V) ≡ 0 dBV

Energy Quantity:

 
Electric power P:
watt		  ↔  Electric Power level LP
dB
Start   Start
Reference power P0 = 1 watt (W) ≡ 0 dB

There is also the reference power P0 = 1 milliwatt or 0.001 watt ≡ 0 dBm

 
Electric power (telephone) P:
watt		  ↔  Electric Power level LP
dBm
Start   Start
Reference power P0 = 1 milliwatt (mW) = 0.001 W ≡ 0 dBm
  Voltage/pressure 
  Amplification factor 		   1  
 		  1.414 
= √2		   2  
 		  3.16
= √10		   4  
 		  10 
 		  20 
 		  40 
 		  100 
 		  1000 
 
  Increasing of x dB  0   3   6   10   12   20   26   32   40   60 

  Power/intensity  
  Amplification factor  		   1  
 		  1.414 
= √2		   2  
 		  3.16
= √10		   4  
 		  10 
 		  20 
 		  40 
 		  100 
 		  1000 
 
  Increasing of y dB  0   1.5   3   5   6   10   13   16   20   30 
 
Aha!
 
The word "power amplifier" is a misnomer. Power is not really something
that can be "amplified". Voltage and current can be amplified. The term
"power amplifier" although technically incorrect has become understood
to mean an amplifier that is intended to drive a load such as a loudspeaker.
We call the product of current and voltage gain just "power amplification".
The total energy within a closed system due to the conservation of energy
is neither increased nor decreased.
 
 
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