Overlapping narrow resonances in dense spectra reveal wave dynamics

Evidence

At higher frequency, the density of modes is so high that even a Q of 1000 might not be enough to avoid strong overlap with dozens of other resonances. We know what an isolated resonance power spectrum looks like; but what if many narrow resonances are strongly overlapping? Does it become smooth, or does it still bounce up and down, and if so, what is the characteristic frequency between bump and dip? This is a fascinating topic, revealing much about the dynamics of the waves propagating and reflecting in the object in question. — Eric J. Heller, Why You Hear What You Hear- An…, 1148

Categorization

• QUESTION: The author poses the open question of whether overlapping narrow resonances produce smooth or bumpy spectra; worth chasing how this resolves in later chapters.