著者

角倉 敏彦 森 秀夫 三宅 隆雄

出版者

公益社団法人 応用物理学会

雑誌

応用物理 (ISSN:03698009)

巻号頁・発行日

vol.34, no.5, pp.334-339, 1965-05-10 (Released:2009-02-09)

参考文献数

11

被引用文献数

1

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Acoustic properties of foamed polymer are affected largely by its cell structure and, to a small extent, by chemical structure of polymer itself. In this paper, examination is made on the relation between acoustic properties and resistance to air flow which is a physical quantity related to cell structure. Acoustic impedance is measured with a standing wave apparatus under various. mounting conditions. Theoretical value of acoustic impedance for a porous material with rigid skeleton is compared with experimental result. For samples with small resistance to air flow, a good agreement is found over a wide range of frequency. When samples are stuck on a rigid wall with adhesive, the resonance occurs in the rigion between 500 and 1000 c/s.