Consider the acoustic power and pressure from a number of omnidirectional sound sources.
(a.) How many sources each producing PWL = 70 dB are required to achieve overall power level PWL = 86 dB?
(b.) What is the power in watts for one source and for all the sources?
(c.) A listener is the same distance from all the sources, and the sources are totally uncorrelated (e.g. produced by unrelated broadband processes, or all at different
frequencies), what is the difference in SPL produced by one source and by all?
(d.) What would be the total number of equidistant uncorrelated sources required to raise SPL by an additional +6 dB?
(e.) If one of the sources produces SPL = 64 dB, how far is that source from the listener?