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Sound absorption and form retention of newly developed heat-insulating/acoustic material

Schallabsorption und Formbeständigkeit eines neu entwickelten Wärme- und Schalldämmmaterials

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Abstract

A wooden mat to be used as heat-insulating/acoustic material was developed using wood shavings in their raw curled flake form as the primary material. This report discusses the influences of fabrication conditions on sound absorption and form retention. The results showed that the form retention was increased with kenaf composition. However, the normal incidence absorption coefficient decreased with increasing kenaf composition and improved with increasing shavings composition. The increase of airflow resistivity was shown as the reason. Moreover, element’s internal loss of solid-borne sound transmission and the influences of various acoustic parameters that the shape of the element brought were considered as the reason. Sound absorption coefficient in a reverberation room was measured under optimum fabrication conditions, and the performance of the mat was found to be approximately equal to that of glass wool.

Zusammenfassung

Entwickelt wurde eine Holzmatte zur Verwendung als Wärme- und Schalldämmmaterial. Dafür wurden als Hauptmaterial natürlich gekrümmte Hobelspäne verwendet. In dieser Studie wird der Einfluss der Herstellungsbedingungen auf die Schallabsorption und Formbeständigkeit beschrieben. Die Ergebnisse zeigten, dass die Formbeständigkeit mit zunehmendem Anteil an Kenafbast zunahm. Jedoch nahm die Dämmwirkung mit zunehmendem Kenafanteil ab und mit zunehmendem Hobelspananteil zu. Als Grund dafür wurde die Zunahme des Luftstromwiderstandes festgestellt. Außerdem wurde die geringere Körperschallübertragung sowie von der Spanform abhängige Akustikparameter als Grund hierfür angesehen. Es wurde der Schallabsorptionsgrad in einem Hallraum unter optimalen Herstellungsbedingungen gemessen und es wurde gezeigt, dass die Eigenschaften der Matte mit denjenigen von Glaswolle vergleichbar sind.

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Acknowledgements

We extend our heartfelt gratitude to Tokushima Prefectural Industrial Technology Center for their assistance in measuring airflow resistivity.

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Authors and Affiliations

  1. Aichi Industrial Technology Institute, 1-157-1 Onda-cho, Kariya, Aichi, 448-0013, Japan

    Satoshi Fukuta, Miyoko Nishizawa & Yasuo Takasu

  2. Aichi Prefectural Government, 3-1-2 Sannomaru Naka-ku, Nagoya-city, Aichi, 460-8501, Japan

    Yukinobu Ohta

  3. Graduate School of Bioagricultural Science, Nagoya University Furo-cho, Chikusa-ku, Nagoya-city, Aichi, 464-8601, Japan

    Tatsunori Mori, Mariko Yamasaki & Yasutoshi Sasaki

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  1. Satoshi Fukuta
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  2. Miyoko Nishizawa
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  3. Yasuo Takasu
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  4. Yukinobu Ohta
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  5. Tatsunori Mori
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  6. Mariko Yamasaki
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  7. Yasutoshi Sasaki
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Correspondence to Satoshi Fukuta.

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Fukuta, S., Nishizawa, M., Takasu, Y. et al. Sound absorption and form retention of newly developed heat-insulating/acoustic material. Eur. J. Wood Prod. 70, 697–704 (2012). https://doi.org/10.1007/s00107-012-0607-x

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  • DOI: https://doi.org/10.1007/s00107-012-0607-x

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