title: Comment on "A theoretical framework for quantitatively characterizing sound field diffusion based on scattering coefficient and absorption coefficient of walls" [J. Acoust. Soc. Am. 128, 1140-1148 (2010)] (L).
abstract: The relationship between the acoustic scattering characteristics of materials and the degree of diffusion in enclosed acoustic spaces has recently attracted considerable research attention. Hanyu [J. Acoust. Soc. Am. 128(3), 1140-1148 (2010)] introduced a theoretical framework, in which the diffusion time in an enclosure is expressed as a function of a material's average scattering coefficient. In this letter, a modification of this theory is proposed. The decay process of the sound energy through scattering is divided into discrete sub-processes, specifically, a purely scattering process, and alternating scattering and specular reflections. The behavior of each process is examined for different scattering coefficients.
authors.affiliation: Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Fukuoka 815-8540, Japan. omoto@design.kyushu-u.ac.jp
authors.forename: Akira
authors.initials: A
authors.lastname: Omoto
mesh_terms: D000162:Acoustics; D008962:Models, Theoretical; D013016:Sound