Power fluctuations persist even where resonances overlap completely

Evidence

One might expect the power spectrum to smooth out as the resonances begin to strongly overlap. Instead, as figure 12.5 shows, the oscillation in power continues, apparently indefinitely. The ubiquitous and seemingly capricious power fluctuations, measured at a point in concert halls and, on soundboards, violins, and the like, continue even above the frequency where all the resonances are strongly overlapping (the Schroeder frequency). — Eric J. Heller, Why You Hear What You Hear- An…, 1154

Categorization

• QUESTION: Why would power oscillations persist above the Schroeder frequency despite strong resonance overlap?
• corroborated: 2 independent passages support this claim — Eric J. Heller, Why You Hear What You Hear- An…, 1154
• XREF: connects to: Echo interference creates sinusoidal power fluctuations that average to zero; Driving point reveals whether a resonance peak is isolated or overlapping; Any echo-producing system inevitably exhibits frequency power fluctuations — Eric J. Heller, Why You Hear What You Hear- An…, 1163 (+1 more)

Broader Connections

• Driving point reveals whether a resonance peak is isolated or overlapping #expands (0.75)
• Steady-state frequency response is the reliable indicator of audible room resonances #complicates (0.75) — Toole, Floyd E, Sound reproduction- the acoustics and…, 956
• Any echo-producing system inevitably exhibits frequency power fluctuations #corroborates (0.72) — Eric J. Heller, Why You Hear What You Hear- An…, 1163