Adding acoustic levels summing sound levels 10 combining addition summation sum decibel levels or SPL of up to ten incoherent sound sources audio logarithmic decibel scale identical summing 1/3 octave spl full
Loudness
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How to add two noise decibel dB sources - YouTube
Sound Pressure
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Total dB level adding of incoherent or noncoherent uncorrelated sound sources signals combine sound levels two sources resultant level audio logarithmic decibel scale decibels or SPL sound pressure level add signal noise
SPL sound level to dB pressure level sound pressure sound intensity unit dB Conversion of sound pressure to sound intensity sound units levels calculating spl sound level calculation air sound units level
Solved Working with decibels for Sound Pressure Levels | Chegg.com