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Open AccessArticle

Variability and Performance Study of the Sound Absorption of Used Cigarette Butts

1
Departamento de Física Aplicada, Escuela Politécnica, Universidad de Extremadura, Avda. de la Universidad s/n, 10003 Cáceres, Spain
2
Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, 5 Poniente 1670, 3460000 Talca, Región del Maule, Chile
3
Departamento de Matemáticas, Facultad de Veterinaria, Universidad de Extremadura, Avda. de la Universidad s/n, 10003 Cáceres, Spain
*
Author to whom correspondence should be addressed.
Materials 2019, 12(16), 2584; https://doi.org/10.3390/ma12162584
Received: 3 July 2019 / Revised: 6 August 2019 / Accepted: 12 August 2019 / Published: 14 August 2019
(This article belongs to the Special Issue Innovative Composite Materials for Sound Absorption and Insulation)
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Abstract

There has been increasing interest in new sustainable materials that can be used as construction materials. Among them, sound-absorbing materials have an important role in both acoustical room conditioning and in room insulation. As a proposal for recycling, one of the most common residues in the world, cigarette butts, is studied. Samples were prepared with used cigarette butts as acoustical absorbent materials. Several samples were prepared and grouped by similarity. Variability analyses of the samples prepared in each group were performed. Moreover, the analysis of some possible influences on absorption properties, such as the length of butts, presence of burnt regions, presence of wrapping paper, etc., were analyzed. The results show the potentiality of this residue to be used as an acoustical absorbent since the absorption coefficients found are greater than 0.8 for frequencies over 2000 Hz. The observed variability in the study group and samples can be considered low, as it was below 2% for the major part of frequencies. Influences on the absorption coefficient, for both the length and status of the butts, were statistically confirmed. View Full-Text
Keywords: sound absorber; cigarette butts; sustainable material; recycling; variability analysis sound absorber; cigarette butts; sustainable material; recycling; variability analysis
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Gómez Escobar, V.; Rey Gozalo, G.; Pérez, C.J. Variability and Performance Study of the Sound Absorption of Used Cigarette Butts. Materials 2019, 12, 2584.

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