Coupled-oscillator intuition substitutes for impedance algebra in explaining reeds.

Evidence

A clear explanation of what is going on does not seem to exist anywhere except in the engineer’s and physicist’s algebra of impedance combinations, which we avoid here. We are well prepared to approach this sophisticated problem intuitively, since we have a good understanding of coupled oscillators, their relative phase, and the frequency shifts that result. — Eric J. Heller, Why You Hear What You Hear- An…, 1622