Correlated sound sources sum to between zero and twice their individual amplitudes
Evidence
These calculations show that the summation of correlated sources can be strongly frequency dependent and can vary between zero and twice the wave pressure amplitude. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 267
Categorization
- corroborated: 3 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 267
- XREF: connects to: Superposed sounds cancel or amplify locally without changing each other; Correlated sound sources add pressures while uncorrelated ones add energy; Interference pattern of correlated sources varies with both listener position and frequency — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 241 (+7 more)
Broader Connections
- Correlated source summation swings from zero to twice amplitude by frequency
#corroborates(0.95) - Uncorrelated sound waves sum by power, not by amplitude.
#expands(0.85) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 244 - Sound power and intensity levels are unaffected by source correlation, unlike pressure level
#expands(0.80) - Correlated sound sources create spatial interference patterns that uncorrelated sources do not.
#expands(0.75)