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Communication Dans Un Congrès Année : 2020

20 years of micro-perforated transparent sound absorbers

Résumé

In 1975 the theory of microperforated sound absorbers has been introduced by D.-Y. Maa. The first optically transparent sound absorbers have been applied in the late 1990s. In 2000 a nearly invisible micro-perforation has been introduced to transparent plates and in 2001 to flexible sheets making these highly sound absorptive. Over the twenty years different set-ups made of micro-perforated layers, porous materials as well as plate resonators have been investigated. This type of sound absorber can be combined with translucent sheets as well as heating-cooling devices. Since 2018 light-emitting and sound absorbing ceiliungs in combinations with heating-cooling have been used. In this contribution measured sound absorption coefficients of various set-ups with micro-perforated stretched foils will be presented. Applications in various spaces will be presented and discussed. Day-light ceilings, mirror ceilings as well as absorbers in front of glass will be shown. Finally, some case studies will be discussed.
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Dates et versions

hal-03231784 , version 1 (26-05-2021)

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Christian Nocke. 20 years of micro-perforated transparent sound absorbers. Forum Acusticum, Dec 2020, Lyon, France. pp.947-947, ⟨10.48465/fa.2020.0906⟩. ⟨hal-03231784⟩

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