musique contemporaine

Ircam - articles scientifiques notice originale

On the Reproduction of Directivity Patterns Using Multi-Loudspeaker Sources

Type

text
 

Genre(s)

article
 

Forme(s)

document imprimé
 

Cette ressource est disponible chez l'organisme suivant : Ircam - Centre Pompidou

Identification

Titre

On the Reproduction of Directivity Patterns Using Multi-Loudspeaker Sources
 

Nom(s)

Derogis, Philippe (auteur)
 
Causse, René (auteur)
 
Warusfel, Olivier (auteur)
 

Publication

Le Normont, France , 1995
 

Description

Sujet(s)

acoustique instrumentale   directivity patterns   multi-loudspeaker source   sound radiation  
 

Résumé

A sound source can generally be characterized by three physical properties: timber (spectral and temporal response), loudness and directivity. Although loudspeakers give a faithful reproduction of timber and loudness, their own directivity can conflict with the directivity of the source they aim at reproducing. In the first section of this paper, we describe a general method for reproducing different sorts of directivity patterns using a multi-loudspeaker source. In the second section we apply this method to a particular source with twelve loudspeakers grouped into few subsets for fitting the first zonal harmonics (spherical harmonics with axial symetry). Theoretical results are presented and compared with experimental measurements. These results show a good agreement between the prediction and the experiment below 500 Hz. But it appears, above this frequency, that our source don't correspond with the directivity patterns. In the third section we discuss the limitation of our work and show how our results could be improved by modifying the source geometry and increasing the number of loudspeakers independently driven.
 

Note(s)

Contribution au colloque ou congrès : ISMA: International Symposium of Music Acoustics
 

Localisation

Envoyer la notice

Bookmark and Share 
 

Identifiant OAI

 

Date de la notice

2006-03-14 01:00:00
 

Identifiant portail

 

Contact