Sound Pressure Level (SPL) Calculator

Inverse Square Law- When you double the distance, there will be a 6db loss in SPL

Enter starting SPL at 1 meter: Enter distance (in feet) to determine loss:

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Double the Power Rule-When you double the power, there will be a 3db gain in SPL

Wattage	0.5	1	2	4	8	16	32	64	128	256	512	1024
SPL	0	0	0	0	0	0	0	0	0	0	0	0