On the Role of Acoustical Improvement and Surface Morphology of Seashell Composite Panel for Interior Applications in Buildings

Abstract

This manuscript focuses on the acoustical behaviors and surface morphology of seashell waste filler reinforced polyester (SFRP) coverings Anadara granosa Linn, Perna viridis Linn, and Placuna placenta Linn and applications in buildings. Their acoustical performances were observed using an impedance tube using a technique with two and four microphones based on ASTM E1050-98 and ASTM E2611-09. The improvements of acoustical performance were conducted by a coupled resonator inclusion with addition of a fibrous dacron layer and back cavity. The experimental results showed that the resonators and back cavity on the material structure were able to shift the absorption ability at low frequency. The promising wide broadband frequencies performance occurred when the 15 mm Placuna placenta FRP treated with front-tailed cavity without any additional fibrous layer and air gap started from 0.2 at 2.0 kHz. The combination of resonators and fibrous layer on the material structure was able to stabilize the sound transmission loss (STL) in 52–56 dB at a high frequency. On the observation of the simple surface morphology material, it was found that Placuna placenta Linn had the highest damping performances due to the smallest pores and the most carbon compound compared to the others. Therefore, this finding is very useful for building applications.

Tailoring Acoustic Performances of Resin Reinforced Biomass Fiber-Based Panel with Single and Multiple Tailed Cavity Inclusions for Interior Work

“…Although the sound absorption peaks of kenaf fiber are not as high as those of hemp fiber, kenaf can nonetheless be considered an acoustic material, especially for interior purposes. The findings are in agreement with other studies by Wang et al, Echeveria et al, and Setyowati et al [32] which concluded that the tailed cavity has function as a Helmholtz resonator and is very effective at absorbing sound energy in wide broadband frequencies [32,44,45].…”

“…Like the 30 mm thick samples, the 15 mm coco-husk with a single tailed cavity had absorption performance with a peak in 0.85 at 2.0 kHz, lower than the previous method of quarter wavelength resonators. Due to the cavity functioning like a Helmholtz resonator, such a finding is in agreement with previous studies by Setyowati et al, Echeverria et al and Wang et al [32,44,45]. Second, as Figure 8 indicates, we compared specimens treated with the present methods to the previous study observing coco-husks treated with quarter wavelength resonators and 10 mm air gaps.…”

“…The findings agree with the previous research [32] and should be considered in interior design in buildings where acoustic performance is a priority. The biomass fibers studied in this research, i.e., coco-husk, hemp, and kenaf, are acceptable as acoustic materials.…”

“…Furthermore, many researchers have proposed general acoustic tailoring by the use of additional resonators, porous layers and air back cavities. Setyowati et al developed a unique strategy to improve the acoustic performance of materials by designing tailed cavity inclusion on seashell surface materials [32]. Similar to previous studies, the present research implemented tail cavity inclusion in a resin reinforced biomass fiber for interior applications.…”

The Acoustical Performance of Water Hyacinth Based Porous-Ceramic Compared to the Biomass Fiber Composites for Architecture Application

“…This research not only focuses on porous hexagonal ceramic innovation by using water hyacinth powder in clay mixtures, in that it has the ability of absorption and material insulation but also compares the acoustic performance of porous ceramic with water hyacinth-based composites obtained in previous studies [1]. Meanwhile, several studies on acoustic materials from natural materials have also been carried out [2], [3].…”