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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.

Parameters

Parameters suggested as international standard, e.g. ISO 3382-1

 

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

Reverberation Time—the mother of all room acoustical parameters (BNAM 2010 paper) (presentation)

 

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.
M Barron gave a presentation of the paper Objective assessment of concert hall acoustics.

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*

Subjective level of sound

Sound Strength, G, in dB

500 to 1000

1 dB

-2 dB; +10 dB

Perceived reverberance

Early Decay Time, EDT, in s

500 to 1000

Rel. 5%

1.0s; 3.0s

Perceived clarity of sound

Clarity, C80, in dB
Definition, D50
Centre Time, Ts, in ms

500 to 1000
500 to 1000
500 to 1000

1dB
0.05
10ms

-5 dB; +5 dB
0.3; 0.7
60 ms; 260 ms

Apparent Source Width, ASW

Early Lateral Energy Fraction LF or LFC

125 to 1000

0.05

0.05; 0.35

Listeners Envelopement

Late Lateral Sound Level, LG in dB

125 to 1000

Not known

-14 dB; +1 dB

Ensemble conditions**

Early Support, STEarly (dB)

250 to 2000

Not known

-24 dB; -8dB

Perceived reverberance**

Late Support, STLate (dB)

250 to 2000

Not known

-24dB; -10dB

* Typical range is for averaged values in single positions in auditorium of non-occupied concert– and multi-purpose halls up to 25000 m3 .
** Performers listener aspect, on orchestra platform. See also Stage Acoustics.