Time domain large-scale finite element sound field analysis of a multi-purpose hall

Toru Otsuru, Takeshi Okuzono, Noriko Okamoto, Kota Isobe, Hiroshi Furuya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

The authors have been developing Large-scale Finite Element Sound Field Analysis, or LsFE-SFA for short, to analyze sound fields in architectural rooms with complicated boundary conditions. The main purpose of this paper is to show its applicability and accuracy when a realistic large-scale sound field is to be analyzed in the time domain. A multi-purpose hall (A-hall, for short) with the volume of more than 37, 000 m3 and about 2, 500 seats is analyzed hereafter. At first, both mathematical basis of time domain LsFE-SFA is explained briefly. Then, both frequency and time domain LsFE-SFA were applied onto the sound field in A-hall. In the analyses, two types of boundary modeling, with or without balcony, were given into the computations. The values of absorption coefficient of materials except auditorium side-walls were given by referring literatures, and that of side-walls were given by in-situ measurement following some of the authors' EA-Noise method. By the frequency domain LsFE-SFA, sound pressure level distribution contour maps at 63 and 125 Hz were computed and the results were confirmed to be good. Then, the 1/3 octave band filtered impulse responses centered at 63 Hz and 125 Hz were computed by the time domain LsFE-SFA, and fair agreements with measured data were found. Finally, the results by the time domain LsFE-SFA were transformed into the frequency domain and the relative sound pressure level distributions of them showed excellent agreement with those computed by the frequency domain LsFE-SFA directly.

Original languageEnglish
Title of host publication14th International Congress on Sound and Vibration 2007, ICSV 2007
Pages2442-2449
Number of pages8
Publication statusPublished - 2007 Dec 1
Externally publishedYes
Event14th International Congress on Sound and Vibration 2007, ICSV 2007 - Cairns, QLD, Australia
Duration: 2007 Jul 92007 Jul 12

Publication series

Name14th International Congress on Sound and Vibration 2007, ICSV 2007
Volume3

Conference

Conference14th International Congress on Sound and Vibration 2007, ICSV 2007
CountryAustralia
CityCairns, QLD
Period07/7/907/7/12

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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