Sound Absorption Properties of Charcoal Made from Wood Waste

Olga Khrystoslavenko (), Tomas Astrauskas and Raimondas Grubliauskas
Additional contact information
Olga Khrystoslavenko: Department of Environmental Protection and Water Engineering, Vilnius Gediminas Technical University, Sauletekio al. 11, 10221 Vilnius, Lithuania
Tomas Astrauskas: Institute of Environmental Protection, Vilnius Gediminas Technical University, Sauletekio al. 11, 10221 Vilnius, Lithuania
Raimondas Grubliauskas: Department of Environmental Protection and Water Engineering, Vilnius Gediminas Technical University, Sauletekio al. 11, 10221 Vilnius, Lithuania

Sustainability, 2023, vol. 15, issue 10, 1-13

Abstract: Wood is a sustainable renewable material that is widely used in the building sector. Due to recent trends in green initiatives in European and other countries, wood waste is becoming more popular for sound absorption and insulation because of its renewability. Recycled wood material granulated charcoal is an effective acoustic treatment. In this study, we investigated the sound absorption coefficients of raw wood and granulated charcoal species: birch ( Betula pendula ), pine ( Pinus sylvestris ), and oak ( Quercus robur ). The impedance tube method was used to characterize the sound absorption properties of the granulated charcoal. The maximum bulk densities of the materials investigated were 567 kg/m 3 for birch ( B. pendula ) wood and 247 kg/m 3 for granulated charcoal. The airflow resistivity of wood and granulated charcoal was found using the static airflow method according to the standard. The grain size distribution of charcoal was also determined, with the highest percentage (25–29%) of the birch and pine grain distribution of charcoal species having a size of 400 µm and 30.7% of the oak a size of 1 mm. All species had the lowest grain size value, i.e., 900 µm (1–4%). The sound absorption of granulated charcoal does not depend on the carbonization temperature at 400, 500, or 600 °C. Granular charcoal of 25 mm has a better sound absorption thickness coefficient for birch at 600 °C (0.57 at 315 Hz) compared to wood of the same thickness. The effectiveness of absorption for wood and granular charcoal depends on the type of wood (birch > pine > oak), grain size, airflow resistivity, and bulk density.

Keywords: wood species; sound absorption coefficient; airflow resistivity; impedance tube; wood charcoal (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/10/8196/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/10/8196/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:10:p:8196-:d:1149843

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().