Correlated and uncorrelated sound sources sum by different rules

Evidence

Sound levels add together differently depending on whether they are correlated or uncorrelated. When the sources are correlated, the pressure waves from the correlated sources simply add, as shown in Equation 1.26. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 227

Categorization

• DEFINE: Introduces the correlated/uncorrelated distinction that governs how sound levels combine.
• corroborated: 2 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 227