Addition of SPL − Summing up to ten non-coherent or uncorrelated  noise sources

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
Total Level   dB
Fill in as many sound level boxes as necessary (max 10) and then click the calculate bar, to get the calculated sum. Provided, that each sound source has its own random phasing.