Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10216/500
Autor(es): | Hipólito Sousa A. Carvalho |
Título: | A new sound absorbing lightweight concrete masonry block |
Data de publicação: | 1998 |
Resumo: | The purpose of this paper is to present an innovative design approach for a sound absorbing lightweight concrete masonry unit made with expanded clay LECAÒ. This new type of block is presented and acoustically characterized. This block is especially suited for sound control in critical listening or performance spaces as well for noise control in noisy environments like industrial areas, power transformers substations, sound barriers, etc. The block measures 200x200x500 mm3 and weights about 13.8 kg. Its design and weight allows easy placement. Two options were tested: with and without fiberglass inserts (instaled at the block plant) in the unit's Helmholtz resonators chambers. The sound absorption results obtained in the I.D.I.T.'s reverberant chamber using ISO 354 are presented. Sound absorption coefficients (a) above 0.65 for frequency bands between 200 and 400 Hz were found. Noise Reduction Coefficients (NRC) of 0.61 were calculated. |
Assunto: | Acústica, Engenharia civil Acoustics, Civil engineering |
Áreas do conhecimento: | Ciências da engenharia e tecnologias::Engenharia civil Engineering and technology::Civil engineering |
URI: | https://hdl.handle.net/10216/500 |
Fonte: | Housing- An Heritage for the future-Proceedings of the XXV IAHS World Housing Congress- Volume 1 |
Tipo de Documento: | Artigo em Livro de Atas de Conferência Internacional |
Condições de Acesso: | restrictedAccess |
Licença: | https://creativecommons.org/licenses/by-nc/4.0/ |
Aparece nas coleções: | FEUP - Artigo em Livro de Atas de Conferência Internacional |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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54974.pdf Restricted Access | 436.01 kB | Adobe PDF | Request a copy from the Author(s) |
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