Design of sound diffusers by serial procedure : acoustical adequacy of small rooms to musical performance and listening / Design de difusores sonoros a partir de processo serial : adequação acustica de pequenas salas a performance e audição musical

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This study is aimed at acoustic comfort solutions for music listening and performance by mainly considering psychoacoustic aspects related to subjective listening of musicians and specialists concerned with this field of knowledge. Starting from acoustic evaluation criteria of music rooms (opera houses and concert halls) in Beranek and principles of design and operation of Schroeder Diffusers, this piece of research presents original solutions and conception as well as design solutions for diffusers by taking Schoenberg’s 12- sounds musical composition technique as a starting point. This research can be qualified as technological innovation. Simultaneously, both technical listening and music appreciation listening stand for a basis, a guide, and a main point for this work, as well as the improving conditions that allow good quality listenings makes up its objective. Questions such as: “What is important in the sound for performing musicians?”, “How and what does the musician listen to?” and “What is important for music listening?” are deeply present either in this research or in Beranek’s works, which therefore have been theoretically deemed as one of the starting points in use. The research undertaken – as well as this work – lays within the confluence of three major fields of knowledge: Arts and Humanities (Music, Sonology, Architecture), Science (Physics: Acoustics), and Technology (Audio Engineering, Applied Acoustics, in addition to a few resources from Civil Engineering and Mechanical Engineering). The introduction emphasizes the importance of sound and silence either in music or acoustics. The theoretical basis include an extensive exposition of related acoustic principles, symmetry types, elements of serial musical composition technique, desirable and undesirable aspects in auditoriums, acoustic evaluation parameters of rooms, principles and operation of acoustic diffusers. Three solutions are proposed for new types of diffusers. Two detailed projects of acoustic appropriateness are presented for music rooms and concert halls, where they are applied and, in one of the cases, results therefrom are measured. A simulation of the performance obtained in serial surfaces through modal analysis by checking both quality and performance expected from the conceived diffusers is presented and discussed.

ASSUNTO(S)

acustica (musica) composition (music) sonology (music) composição (musica) musica - interpretação acoustic vibration acoustic (music) music performance acustica - vibração environmental comfort

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