Room mode density rising smoothly with frequency signals good acoustics

Evidence

For a modest hall 15.76 x 20.7 x 11.76 m, there is on average one mode per Hz near 20 Hz, 14 modes per Hz at 100 Hz, and 1200 modes per Hz at 1000 Hz. The first term dominates as f grows, so the density of modes increases approximately as the square of the frequency. — Eric J. Heller, Why You Hear What You Hear- An…, 2435

Categorization

• corroborated: 2 independent passages support this claim — Eric J. Heller, Why You Hear What You Hear- An…, 2435
• XREF: connects to: Hard-walled rooms behave as three-dimensional resonators with many audible modal frequencies — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 291; Room acoustics shift from standing waves to irregular interference as frequency rises — , Toole, Floyd E - Sound reproduction-…, 626; Spatially proportional room dimensions create coincident resonant modes