1Social Determinants in Health Promotion Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
Abstract: (173 Views)
Introduction: Noise pollution represents a major environmental concern, especially in densely populated urban areas, and is a clearly recognizable problem for the general public. To improve living conditions and reduce its harmful impacts on human health, the application of effective sound absorbers is highly recommended.In recent years, there has been a growing trend toward the development and utilization of environmentally friendly sound-absorbing materials, most of which are obtained from agricultural residues. The present study explores the acoustic properties and sound absorption capabilities of such natural materials.
Information sources or data: For this review, relevant studies were identified through systematic searches of the PubMed, ScienceDirect, Scopus, Ovid, Magiran, and the Scientific Information Center of Jahad Daneshgahi databases.
Selection methods for study: The keywords for this narrative review were green sound absorbers, recycled materials, agricultural products, environmentally friendly, human health, sound absorber performance, and environmental pollution. Research articles published from the beginning of 2000 to 2025 were included in this review. Studies were included if they were available in full text and presented research on green sound absorbers, with quantitative data on the material's sound absorption coefficient. The articles were searched in both English and persian languages. From an initial selection of 100 articles, 40 were identified as meeting the quality standards for final analysis.
Combine content and results: This paper investigated the properties of eco-friendly green acoustic absorbers including Coconut fiber, rice husk and straw, tea leaf fiber, corn husk, peanut and fruit shells, palm trunk, fruit pit waste and wood bark. In general, thicker materials show better sound absorption performance in the low and medium frequency range. Furthermore, higher density is associated with better sound absorption performance at the same thickness. Furthermore, increasing the distance between the sound absorbing material and the back air cavity increases the sound absorption performance at low frequencies.
Conclusion: Natural materials possess unique acoustic properties that can be further enhanced through appropriate processing and application. The findings of this study may contribute to the development of new and improved acoustic materials, thereby promoting sustainability and reducing the environmental impact associated with conventional sound absorbers.
Information sources or data: For this review, relevant studies were identified through systematic searches of the PubMed, ScienceDirect, Scopus, Ovid, Magiran, and the Scientific Information Center of Jahad Daneshgahi databases.
Selection methods for study: The keywords for this narrative review were green sound absorbers, recycled materials, agricultural products, environmentally friendly, human health, sound absorber performance, and environmental pollution. Research articles published from the beginning of 2000 to 2025 were included in this review. Studies were included if they were available in full text and presented research on green sound absorbers, with quantitative data on the material's sound absorption coefficient. The articles were searched in both English and persian languages. From an initial selection of 100 articles, 40 were identified as meeting the quality standards for final analysis.
Combine content and results: This paper investigated the properties of eco-friendly green acoustic absorbers including Coconut fiber, rice husk and straw, tea leaf fiber, corn husk, peanut and fruit shells, palm trunk, fruit pit waste and wood bark. In general, thicker materials show better sound absorption performance in the low and medium frequency range. Furthermore, higher density is associated with better sound absorption performance at the same thickness. Furthermore, increasing the distance between the sound absorbing material and the back air cavity increases the sound absorption performance at low frequencies.
Conclusion: Natural materials possess unique acoustic properties that can be further enhanced through appropriate processing and application. The findings of this study may contribute to the development of new and improved acoustic materials, thereby promoting sustainability and reducing the environmental impact associated with conventional sound absorbers.
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