A modified diffusion equation for room-acoustic predication (L)

Yun Jing, Ning Xiang

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


This letter presents a modified diffusion model using an Eyring absorption coefficient to predict the reverberation time and sound pressure distributions in enclosures. While the original diffusion model [Ollendorff, Acustica 21, 236-245 (1969); J. Picaut, Acustica 83, 614-621 (1997); Valeau, J. Acoust. Soc. Am. 119, 1504-1513 (2006)] usually has good performance for low absorption, the modified diffusion model yields more satisfactory results for both low and high absorption. Comparisons among the modified model, the original model, a geometrical-acoustics model, and several well-established theories in terms of reverberation times and sound pressure level distributions, indicate significantly improved prediction accuracy by the modification.

Original languageEnglish (US)
Pages (from-to)3284-3287
Number of pages4
JournalJournal of the Acoustical Society of America
Issue number6
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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