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separation and frequency

separation and frequency are directly proportional

constructive interference

crest to crest or trough to trough; in-phase

destructive interference

crest to trough or through to crest; out-phase


an integer or 0


a decimal

diffraction angle (of a speaker)

sin⊕ = 1.22(wavelength/diameter)


velocity/frequency in Hz

frequency of a string fixed at both ends



√f/linear density

wavelength open at one end


distance between node and antinode


frequency tube open at both ends


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