- 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
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.