Spatial-averaged measurement curves reveal real resonances through shared bumps.

Evidence

The meaningful measurement is the steady-state response. It reveals the existence of audible resonances that are confirmed in waterfalls, but waterfalls with high-frequency resolution have such poor time resolution that they provide misleading visual information. In audio forum discussions and manufacturers’ data there have been numerous examples of erroneous conclusions being drawn from waterfall data of this kind. Usually, the authors don’t reveal the parameters of the measurement; in some cases one suspects that they did not know, or know that it mattered. In terms of the audibility of resonances in rooms, the reliable indicator is the steady-state frequency response, not the time-domain response, certainly not a waterfall that artificially prolongs the apparent ringing. — Toole, Floyd E, Sound reproduction- the acoustics and…, 956 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Resonance is universal constructive addition of force-driven velocity — Eric J. Heller, Why You Hear What You Hear- An…, 1012; Spatial averaging of room curves reveals boundary effects hidden in individual measurements; Steady-state frequency response is the reliable indicator of audible room resonances — Toole, Floyd E, Sound reproduction- the acoustics and…, 956

Broader Connections

• Steady-state frequency response is the reliable indicator of audible room resonances #corroborates (0.95) — Toole, Floyd E, Sound reproduction- the acoustics and…, 956