Small listening rooms lack diffuse reverberation and contain only early reflections

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

Categorization

• DEFINE: Clarifies why reverberation time is a misnomer for small rooms, distinguishing reflection decay time from resonance ringing time.
• corroborated: 2 independent passages support this claim — Toole, Floyd E, Sound reproduction- the acoustics and…, 477
• XREF: connects to: Envelopment in small rooms must come from recordings rather than natural reflections; Dipole surround speakers degraded direct sound without creating effective diffuse fields.; Early reflections are beneficial for recreational home listening but optional to treat. (+11 more)

Broader Connections

• In small rooms reflections arrive early and never form a diffuse field #corroborates (0.95) — , Toole, Floyd E - Sound reproduction-…, 1153
• Small playback rooms impose their own early reflections on recorded sound #corroborates (0.90)
• A small listening room’s first reflections mask the recorded acoustic space #expands (0.85)
• Real listening rooms produce semi-reflective fields, not free or diffuse fields #corroborates (0.80)