Naive resonance matching alone cannot explain Savart’s cup amplification.

Evidence

This is merely a description—not an explanation! It leaves out crucial details and is even a little bit wrong. For example, the maximum loudness may not quite be on top of the resonance (see section 20.5). There is no hint that the amplification ceases if the resonator tube is moved a few inches farther away from the bowl, as it does. — Eric J. Heller, Why You Hear What You Hear- An…, 1879

Categorization

• CANDY: Even the ‘match the resonances’ simple story fails for Savart’s cup — peak loudness isn’t on the resonance.