Experimental validations of acoustic diffractions using portable goniometer with high angular resolution and large radii

Author
Kawasaki, Jonathan
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Other Contributors
Xiang, Ning; Braasch, Jonas; Perry, Chris (Christopher S.);
Date Issued
2018-08
Subject
Architectural sciences
Degree
MS;
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.; Attribution-NonCommercial-NoDerivs 3.0 United States
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https://hdl.handle.net/20.500.13015/2246
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
Department
School of Architecture;
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection;
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CC BY-NC-ND. Users may download and share copies with attribution in accordance with a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License. No commercial use or derivatives are permitted without the explicit approval of the author.;
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CC BY-NC-ND. Users may download and share copies with attribution in accordance with a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License. No commercial use or derivatives are permitted without the explicit approval of the author.
Except where otherwise noted, this item's license is described as CC BY-NC-ND. Users may download and share copies with attribution in accordance with a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License. No commercial use or derivatives are permitted without the explicit approval of the author.