2 novos artigos por Diogo Alarcão

On the Acoustics of the Vianna da Motta Auditorium in Lisbon
Diogo Alarcão, Pedro Bello, Octávio Inácio

A Acústica do Auditório Vianna da Motta de Lisboa

Este artigo aborda a assinatura acústica do Auditório Vianna da Motta da Escola Superior de Música de Lisboa do Instituto Politécnico de Lisboa, em Portugal. O estudo realizado visou correlacionar os parâmetros acústicos objetivos medidos com as impressões acústicas subjetivas das performances musicais dentro do auditório. A avaliação acústica objetiva recorreu aos procedimentos normalizados segundo a NP ISO 3382, mas também a medições binaurais com um manequim de cabeça, medições com um array esférico de 64 canais através de uma câmera acústica, bem como a software de modelação acústica.

Disponível em:
https://www.dropbox.com/sh/r4i6v1di7odwff0/AAC7dNTl7j-Ug7wCk4oViqMDa?dl=0

Diogo Alarcão is the first author of the paper “Determination of room acoustic parameters using spherical beamforming – The example of Lisbon’s Garrett Hall” that was published in the scientific journal Applied Acoustics, volume 192, April 2022.

Available at:

https://doi.org/10.1016/j.apacoust.2022.108734

Abstract:
This paper focus on the determination of room acoustic objective parameters using rigid sphere spherical beamforming. This determination was done through post-processing of the audio signals recorded with a 64-channel spherical acoustic camera. The work was carried out during the acoustical assessment of the Garrett Hall in the D. Maria II National Theatre in Lisbon. For comparison purposes, the assessment was complemented using standard experimental measuring techniques, according to the ISO 3382 standard, employing an omnidirectional and a figure-of-eight microphone. The obtained results show that the average Hall’s acoustic metrics obtained through spherical beamforming agree very well with the corresponding metrics as determined through the ISO 3382 procedure, except for the early lateral fraction JLF, where some differences in most octave bands is seen.