Room treatment absorbers receive sound at 45 to 60 degrees incidence

Evidence

Only recently have researchers addressed the issue of directional absorption, the performance that matters when we place absorbers to reduce the energy in specific early reflections, like the side wall reflections. The angle of incidence of these reflections is often in the range 45° to 60°, as can be seen in Figure 2.10. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1371

Categorization

• QUESTION: Why has directional absorption only recently been studied — what method made it tractable? Worth chasing the literature.
• XREF: connects to: Sound angled into absorbers absorbs more by traveling through more material — Toole, Floyd E, Sound reproduction- the acoustics and…, 1372
• yield-rescued: below the book’s yield-target cutoff, included anyway for connecting to: Sound angled into absorbers absorbs more by traveling through more material — Toole, Floyd E, Sound reproduction- the acoustics and…, 1372