Experimental validations of acoustic diffractions using portable goniometer with high angular resolution and large radii
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Authors
Kawasaki, Jonathan
Issue Date
2018-08
Type
Electronic thesis
Thesis
Thesis
Language
ENG
Keywords
Architectural sciences
Alternative Title
Abstract
Diffusion is used in room acoustics to distribute sound energy and reduce concentrated refected energy and is measured using a goniometer. This experiment explores an improved portable goniometer design with microphones rotated at 1.25 degrees apart in a full circle. The microphones are embedded in a thin, light arch with a radius at 2.5 and 5 meters to collect from 288 points compared to the current standard AES-4id-2001 which collects from 72 points in a semi-circle. The large radius is crucial to satisfy far-eld conditions and higher resolution to validate the physical theory of diffraction, edge diffractions, and improve data of diffusers, both manufactured and simulated.
Description
August 2018
School of Architecture
School of Architecture
Full Citation
Publisher
Rensselaer Polytechnic Institute, Troy, NY