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akutek.info |
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The www center for search, research and free sharing in acoustics |
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This page is dedicated to room acoustical parameters for concert halls. Sound examples with corresponding values are presented on the akuTEK demo page Reverberant Space. |
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Parameters |
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Parameters suggested as international standard, e.g. ISO 3382-1
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Reverberation time (RT) is an important global parameter describing the overall acoustical properties of a hall, even if it in the ISO3382 is not associated with any of the five listener-specific aspects (above). It can be shown that statistically, EDT, G, C and LG are dependent of RT, source-receiver distance and hall volume. Room acoustical parameters at listeners’ ears—can preferred concert hall acoustics be predicted and explained? (ICA 2010 preprint) by M Skålevik
Mike Barron reports that subjective level of sound (loudness) relates to distance. Paper. Presentation. Relevant papers from the conference Auditorium Acoustics 2008 in Oslo, Norway: M Skålevik gave a presentation of the paper Room acoustic parameters - distribution over the concert hall seating area. Reverberation can be visualized with the Audio Camera. External link: Visualizing Concert Hall Reverberation A Buen: Early Design Criteria for Multipurpose Cultural Houses (paper) (presentation)
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Subjective listener aspect |
Acoustic quality |
Single number frequency averaging (Hz) |
Just Noticeable Difference (JND) |
Typical range* |
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Subjective level of sound |
Sound Strength, G, in dB |
500 to 1000 |
1 dB |
-2 dB; +10 dB |
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Early Decay Time, EDT, in s |
500 to 1000 |
Rel. 5% |
1.0s; 3.0s |
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Perceived clarity of sound |
Clarity, C80, in dB |
500 to 1000 |
1dB |
-5 dB; +5 dB |
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Apparent Source Width, ASW |
Early Lateral Energy Fraction LF or LFC |
125 to 1000 |
0.05 |
0.05; 0.35 |
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Listeners Envelopement |
Late Lateral Sound Level, LG in dB |
125 to 1000 |
Not known |
-14 dB; +1 dB |
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Ensemble conditions** |
Early Support, STEarly (dB) |
250 to 2000 |
Not known |
-24 dB; -8dB |
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Perceived reverberance** |
Late Support, STLate (dB) |
250 to 2000 |
Not known |
-24dB; -10dB |
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* Typical range is for averaged values in single positions in auditorium of non-occupied concert– and multi-purpose halls up to 25000 m3 .
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