Affiliation:
1. Department of Environmental Protection and Water Engineering, Vilnius Gediminas Technical University, Vilnius, Lithuania
Abstract
The acoustic diffuser is the device that distributes the acoustic energy of intense reflections through their
spatial and temporal dispersion. The device for reduction of unvented acoustic effects and improves indoor sound
quality. Triangle diffusers are made of wood plates and covered with charcoal elements. The high sound reflection
co-efficient of charcoal is in the production of diffusers. Charcoal is an ecologically friendly and natural material. The
result of studies of the triangle diffusers made of charcoal showed high values of the sound scattering coefficient, with
a maximum value (of 87) at the frequencies of 2000 with 80% of charcoal. Increasing the percent of charcoal increasing
in sound scattering. The device installs in the audiences of concert halls, recording rooms, and museums.
Reference26 articles.
1. Azad, H., & Siebein, G. (2018). On the prediction of sound diffusion coefficient. The Journal of the Acoustical Society of America, 143(3), 1896. https://doi.org/10.1121/1.5036168
2. Beranek, L. L., & Hidaka, T. (1998). Sound absorption in concert halls by seats, occupied and unoccupied, and by the hall's interior surfaces. The Journal of the Acoustical Society of America, 104(6), 3169-3177. > https://doi.org/10.1121/1.423957
3. Cox, T. J., & D'antonio, P. (2009). Acoustic absorbers and diffusers: Theory, design and application (2nd ed.). CRC Press. https://doi.org/10.4324/9781482266412
4. Cox, T. J., & D'Antonio, P. (2017). Designing triangular diffusers for architectural acoustics. The Journal of the Acoustical Society of America, 141(5), 3663. https://doi.org/10.1121/1.4987935
5. Cox, T. J., Dalenback, B.-I., D'Antonio, P., Embrechts, J.-J., Jeon, J. Y., Mommertz, E., & Vorländer, M. (2006). A tutorial on scattering and diffusion coefficients for room acoustic surfaces. Acta Acustica United with Acustica, 92, 1-15. https://www.researchgate.net/publication/233688510