Critical distance in concert halls is often only a few rows into the audience.

Evidence

Calculation of the Schroeder frequency assumes meaningful reverberation times, a strongly diffuse sound field and a volume unimpeded by large objects (furniture and people are large objects in small rooms). Small listening rooms and recording control rooms are too absorptive to have a meaningful diffuse sound field and a reverberation time—a reflection decay time would be a better description at middle and high frequencies and resonance ringing time at low frequencies. — Toole, Floyd E, Sound reproduction- the acoustics and…, 477 (#complicates, via linked claim)

Categorization

• XREF: connects to: Occupied audiences absorb up to 90 percent of incident sound in a hall; Small listening rooms lack diffuse reverberation and contain only early reflections — Toole, Floyd E, Sound reproduction- the acoustics and…, 477

Related

• Concert hall reverberation times range from one to two seconds (similarity 0.86)
• Critical distance is ill-defined in small rooms because short reverberation times fail steady state (similarity 0.86)
• Occupied audiences absorb up to 90 percent of incident sound in a hall (similarity 0.86)
• True diffuse sound fields cannot form in small absorptive listening rooms (similarity 0.85)
• In small rooms RT target 0.2-0.5 s; early reflections dominate mid-high frequencies (similarity 0.85)
• Smaller listening areas require less acoustic absorption treatment (similarity 0.85)
• We mostly listen to recorded sound in small rooms, not performance halls (similarity 0.84)
• Small listening rooms lack diffuse reverberation and contain only early reflections (similarity 0.84)
• Air absorption in rooms under 40 cubic meters is acoustically negligible (similarity 0.83)
• An audience’s breathing and perspiration dynamically alter a hall’s high-frequency acoustics (similarity 0.83)
• Concert halls need 1–2 seconds of reverberation balancing loudness against clarity (similarity 0.83)
• Room absorption and source directivity shift the critical distance only by their square roots (similarity 0.83)
• Listening in large reverberant venues may compromise discernible sound qualities (similarity 0.83)
• Reverberation gives performers a perceived output lift, so they prefer live rooms (similarity 0.82)
• Halls vary reverberation time by either adding volume or adding absorption (similarity 0.82)

Broader Connections

• Occupied audiences absorb up to 90 percent of incident sound in a hall #contradicts (0.90)
• Small listening rooms lack diffuse reverberation and contain only early reflections #complicates (0.80) — Toole, Floyd E, Sound reproduction- the acoustics and…, 477