Acoustic effectiveness of pulpit reflector in churches

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2001

Autores

Victor Desarnaulds (Autor) Outra; P. Chauvin (Autor) Outra; A. P. Carvalho (Autor) FEUP

Ata de Conferência Internacional

Título: Proceedings of the 17th International Congress on Acoustics

17th ICA

Roma, Itália, 2 a 7 de Setembro de 2001

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

CORDIS: Ciências Físicas > Física > Acústica

Outras Informações

Abstract (EN): Since the 12th century, pulpits and pulpit reflectors (canopies) were widely used in churches. This paper studies the acoustic effectiveness of such devices based on in site measurements (STI and D50) in four (unoccupied) churches with pulpits with and without the canopy. The pulpit reflector can remove the late reflection resulting from a high ceiling and makes possible to improve the listening conditions at medium distance from the pulpit. The pulpit reflector effectiveness decreases and becomes even unfavourable when the height of the ceiling drops (h < 10 m) and when the distance to the speaker increases. The absolute variations of speech intelligibility ratings are generally rather weak (average STI variation from +0.01 to -0.03), but can increase in the presence of an assembly.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 2