Combining 30 sound levels - combining decibels or SPL of incoherent noise sound sources - sengpielaudio
 
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• Combining Decibels − up to 30 Levels •

Level  adding - summing up to 30 incoherent  noise sources

The decibel calculator can be used to combine the levels of up to thirty incoherent
electric or acoustic sources when the level of each source is known in decibels (dB).

Level 1   dB
Level 2   dB
Level 3   dB
Level 4   dB
Level 5   dB
Level 6   dB
Level 7   dB
Level 8   dB
Level 9   dB
Level 10   dB
Level 11   dB
Level 12   dB
Level 13   dB
Level 14   dB
Level 15   dB
Level 16   dB
Level 17   dB
Level 18   dB
Level 19   dB
Level 20   dB
Level 21   dB
Level 22   dB
Level 23   dB
Level 24   dB
Level 25   dB
Level 26   dB
Level 27   dB
Level 28   dB
Level 29   dB
Level 30   dB
Total Level   dB

Fill in as many sound level boxes as necessary and then click the calculate bar,
to get the calculated sum. Provided that each sound source has its own random phasing.

Combining decibels of one-third octave bands to level of octave band and vice versa

Total level adding of up to ten (10) incoherent sources

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