What room-acoustic and listening-level numbers do EBU Tech 3276 and ITU-R BS.1116-3 state for a reference listening room, and what are they scoped for?
EBU Tech 3276 (2nd ed., 1998) and ITU-R BS.1116-3 (2015) set the same room targets. Average reverberation time is Tm = 0.25 x (V / 100 m3)^(1/3) seconds (BS.1116-3 measures it over 200 Hz-4 kHz). Early reflections in the first 15 ms should be at least 10 dB below the direct sound between 1 and 8 kHz. Background noise should preferably stay at NR 10 and never exceed NR 15, with -18 dBFS alignment. They differ on listening level: Tech 3276 uses 85 - 10 log(n) dB(A) for n channels, BS.1116-3 uses 78 +/- 0.25 dBA. Both are for assessment and reference listening rooms, not mix-room certification.
EBU Tech 3276 (2nd ed., 1998) and ITU-R BS.1116-3 (2015) set the same room targets. Average reverberation time is Tm = 0.25 x (V / 100 m3)^(1/3) seconds (BS.1116-3 measures it over 200 Hz-4 kHz). Early reflections in the first 15 ms should be at least 10 dB below the direct sound between 1 and 8 kHz. Background noise should preferably stay at NR 10 and never exceed NR 15, with -18 dBFS alignment. They differ on listening level: Tech 3276 uses 85 - 10 log(n) dB(A) for n channels, BS.1116-3 uses 78 +/- 0.25 dBA. Both are for assessment and reference listening rooms, not mix-room certification.
Curator qualifications: Documents read 2026-10-22; no room measured.
Limitations: Documents read 2026-10-22; no room measured.
Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.
Structured fields
{
"citations": [
{
"url": "https://tech.ebu.ch/docs/tech/tech3276.pdf",
"note": "EBU Tech 3276 2nd edition May 1998, sections 2.2-2.6; ITU-R BS.1116-3 (02/2015), Scope and sections 8.2.3.1, 8.3.3.1, 8.4.1"
},
{
"url": "https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1116-3-201502-I!!PDF-E.pdf",
"note": "EBU Tech 3276 2nd edition May 1998, sections 2.2-2.6; ITU-R BS.1116-3 (02/2015), Scope and sections 8.2.3.1, 8.3.3.1, 8.4.1"
}
]
}Evidence claims
- [sourced_fact] EBU Tech 3276 (2nd ed., 1998) and ITU-R BS.1116-3 (2015) set the same room targets. Average reverberation time is Tm = 0.25 x (V / 100 m3)^(1/3) seconds (BS.1116-3 measures it over 200 Hz-4 kHz). Early reflections in the first 15 ms should be at least 10 dB below the direct sound between 1 and 8 kHz. Background noise should preferably stay at NR 10 and never exceed NR 15, with -18 dBFS alignment. They differ on listening level: Tech 3276 uses 85 - 10 log(n) dB(A) for n channels, BS.1116-3 uses 78 +/- 0.25 dBA. Both are for assessment and reference listening rooms, not mix-room certification. · locator: EBU Tech 3276 2nd edition May 1998, sections 2.2-2.6; ITU-R BS.1116-3 (02/2015), Scope and sections 8.2.3.1, 8.3.3.1, 8.4.1 source
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | permitted | permitted | unknown | unknown | Applies to this original summary only, not to the cited sources. |