Room mode distribution criterion for non-rectangular rooms

Dunn M, Emms G. Room mode distribution criterion for non-rectangular rooms. In: AES Convention 153. Audio Engineering Society; 2022. Paper 23. Available from: https://aes.org/publications/elibrary-page/?id=21904

@inproceedings{Dunn2022_21904,
  author = {Dunn, Malcolm and Emms, Grant},
  title = {{Room mode distribution criterion for non-rectangular rooms}},
  booktitle = {AES Convention 153},
  note = {Paper 23},
  year = {2022},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=21904}
}

TY  - CPAPER
TI  - Room mode distribution criterion for non-rectangular rooms
AU  - Dunn, Malcolm
AU  - Emms, Grant
T2  - AES Convention 153
M1  - Paper 23
PY  - 2022
DA  - 2022/10/06
UR  - https://aes.org/publications/elibrary-page/?id=21904
PB  - Audio Engineering Society
LA  - en
AB  - This paper looks at how the principles used in the development of the Walker criterion[1] for room mode distribution can be expanded to provide a new criterion for both rectangular and non-rectangular spaces. Walker[1] utilized a Quality Index (QI) based on mean squared mode spacing. The Quality Index can be applied to both rectangular and non-rectangular rooms. However, larger rooms naturally have a larger number of modes and therefore a naturally higher QI. For the QI to be useful in assessing the suitability of non-rectangular room shapes of a given, fixed volume, a relationship between QI and room volume needs to be established to remove the dependence of QI on the room volume. This paper shows how this relationship can be established by calculating the Quality Index of a number of rectangular rooms, and observing how the QI changes as the room is scaled in size. A criterion that can be used to separate rooms with ‘acceptable’ modal distribution rooms from ‘non-acceptable’ rooms is proposed. The proposed performance criterion is applicable to both rectangular and non-rectangular rooms.
ER  -