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Reduction in Sound Pressure Level  distance (Spherical & Cylindrical Waves)

Enter SPL*

dB

Enter Distance*

m

Result
(Point Source)

dB

Result
(Line Source)

dB

Add Sound Pressure Levels 

dB

dB

dB

dB

Result
(Phase Coherent Source)

dB

Result
(Non-Phase Coherent Source)

dB

 Center Band Frequency

Enter Lo Freq*

Hz

Enter Hi Freq*

Hz

Result
(Geometric Mean)

Hz

Result
(Arithmetic Mean)

Hz

Loudspeaker Sensitivity with watts over distance

Enter Loudspeaker Sensitivity*

dB

Enter Amplifier Power *

watt

Result
(Achieved SPL)

dB

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