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Measured early lateral energy fractions in concert halls and opera houses

Identifieur interne : 000032 ( PascalFrancis/Curation ); précédent : 000031; suivant : 000033

Measured early lateral energy fractions in concert halls and opera houses

Auteurs : M. Barron [Royaume-Uni]

Source :

RBID : Pascal:00-0262962

Descripteurs français

English descriptors

Abstract

In the 30 years since early lateral reflections were first suggested as important for concert halls, spatial impression and source broadening have become almost universally accepted as essential characteristics of halls with good acoustics. Two objective measures of source broadening have been proposed. Measured values of the best defined of these measures, the early lateral energy fraction (LF), are considered here. Results from two independent measurement surveys are discussed. Comparisons of LF values by hall show a significant link between hall mean LF and hall width. There is however considerable overlap between measured LF values in different halls so the relevance of describing halls by their mean early lateral energy fraction values is questionable. The behaviour of LF values within auditoria is discussed for different concert hall plan forms and within opera houses. A measure of source broadening including sound level is proposed and results considered in the context of auditorium design.
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A08 01  1  ENG  @1 Measured early lateral energy fractions in concert halls and opera houses
A09 01  1  ENG  @1 Workshop on opera house acoustic, Seattle, June 1998
A11 01  1    @1 BARRON (M.)
A14 01      @1 Department of Architecture and Civil Engineering, University of Bath @2 Bath BA2 7AY @3 GBR @Z 1 aut.
A18 01  1    @1 Interuniversity Centre for Acoustics and Musical Research @3 ITA @9 patr.
A18 02  1    @1 Music and Concert Hall Acoustics @3 JPN @9 patr.
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C01 01    ENG  @0 In the 30 years since early lateral reflections were first suggested as important for concert halls, spatial impression and source broadening have become almost universally accepted as essential characteristics of halls with good acoustics. Two objective measures of source broadening have been proposed. Measured values of the best defined of these measures, the early lateral energy fraction (LF), are considered here. Results from two independent measurement surveys are discussed. Comparisons of LF values by hall show a significant link between hall mean LF and hall width. There is however considerable overlap between measured LF values in different halls so the relevance of describing halls by their mean early lateral energy fraction values is questionable. The behaviour of LF values within auditoria is discussed for different concert hall plan forms and within opera houses. A measure of source broadening including sound level is proposed and results considered in the context of auditorium design.
C02 01  X    @0 001B40C55
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C03 01  X  ENG  @0 Acoustics @5 01
C03 01  X  SPA  @0 Acústica @5 01
C03 02  X  FRE  @0 Méthode mesure @5 02
C03 02  X  ENG  @0 Measurement method @5 02
C03 02  X  SPA  @0 Método medida @5 02
C03 03  X  FRE  @0 Acoustique salle @5 03
C03 03  X  ENG  @0 Room acoustics @5 03
C03 03  X  SPA  @0 Acústica sala @5 03
C03 04  X  FRE  @0 Source sonore @5 04
C03 04  X  ENG  @0 Sound source @5 04
C03 04  X  SPA  @0 Fuente sonora @5 04
C03 05  1  FRE  @0 Réflexion onde acoustique @5 05
C03 05  1  ENG  @0 Acoustic wave reflection @5 05
C03 06  X  FRE  @0 Salle concert @5 06
C03 06  X  ENG  @0 Concert hall @5 06
C03 06  X  SPA  @0 Sala concierto @5 06
C03 07  X  FRE  @0 Analyse objective @5 07
C03 07  X  ENG  @0 Objective analysis @5 07
C03 07  X  SPA  @0 Análisis objetivos @5 07
C03 08  X  FRE  @0 Opéra bâtiment @5 08
C03 08  X  ENG  @0 Opera(building) @5 08
C03 08  X  SPA  @0 Ópera(edificio) @5 08
C03 09  X  FRE  @0 Auditorium @5 09
C03 09  X  ENG  @0 Auditorium @5 09
C03 09  X  SPA  @0 Auditorio @5 09
C03 10  X  FRE  @0 Corrélation croisée @5 10
C03 10  X  ENG  @0 Cross correlation @5 10
C03 10  X  SPA  @0 Correlación cruzada @5 10
C03 11  X  FRE  @0 Latéral @5 12
C03 11  X  ENG  @0 Lateral @5 12
C03 11  X  SPA  @0 Lateral @5 12
C03 12  X  FRE  @0 Signal acoustique @5 13
C03 12  X  ENG  @0 Acoustic signal @5 13
C03 12  X  SPA  @0 Señal acústica @5 13
C03 13  X  FRE  @0 Niveau acoustique @5 14
C03 13  X  ENG  @0 Sound level @5 14
C03 13  X  SPA  @0 Nivel acústico @5 14
C03 14  X  FRE  @0 4355 @2 PAC @4 INC @5 56
N21       @1 178
pR  
A30 01  1  ENG  @1 Workshop on Opera House Acoustics @3 Seattle WA USA @4 1998-06

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