Year: 1995
Type: article
Abstract: It is required for ideal acoustic diffusers that the incident acoustic energy is scattered, without any loss of energy, in all directions with equal distributions.Quadratic-residue type diffusers were designed for this aim.But it has become clear that such type of diffusers also provide highly selective and inevitable absorption depending on both the frequency and the angle of incidence.In this article, in order to develop optimum acoustic diffusers that provide highly diffuse reflections and less absorption of sound, the possibility of realization is discussed theoretically.A measure regarding the statistics of diffusion is defined, which enables one to evaluate the performance of the diffusers.As a result, it is shown that a surface profile that satisfies the condition of optimum diffuser can be obtained without any difficulty in manufacturing.The design procedure and a few examples are presented.
DOI: 10.1250/ast.16.51
Author: Daiji Takahashi
Institution: University of Fukui
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2017944500