dB total voltage and total power level in dB with phase angle - sengpielaudio Checker
 
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• Amplitude sum and squared total amplitude in dB •

• Voltage sum and power sum level in dB with phase angle •

With Voltage values (equal phase) the calculation rule is:
Sum in dB = 20 × log10(10(dB1/20) + 10(dB2/20) + ... 10(dBn/20))
With a phase angle unequal 0° the vectors must be added (amount and phase)
and then the dBs of the normal vector have to be calculated:

dB value 1:
 		dB value 2:
 		Phase angle in °:
 		Sum in dB:
 		Phase angle in °:
2 ×
With Power values (random phase) the calculation rule is:
Sum in dB = 10 × log10(10(dB1/10) + 10(dB2/10) + ... 10(dBn/10))

dB value 1:
 		dB value 2:
 		Sum in dB:
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