@article{oai:jaxa.repo.nii.ac.jp:00034586,
 author = {IGARASHI, Juichi and TOYAMA, Masasuke},
 issue = {10},
 journal = {東京大學航空研究所報告, Report/Aeronautical Research Institute, University of Tokyo},
 month = {Dec},
 note = {Attenuation characteristics of several acoustical low-pass filters have been studied theoretically and experimentally. A method of electrical equivalent network was applied to the acoustical elements, such as cavities, resonators, internal tube type cavities and cavities with absorbing material. Each element was represented by four terminal matrix, and attenuation of the system was calculated from their products. By an automatic recording system, frequency characteristics of various acoustical elements and their combination were measured. They show good agreement with calculation., 資料番号: SA2404791000},
 pages = {223--241},
 title = {FUNDAMENTALS OF ACOUSTICAL SILENCERS : (I) Theory and experiment of acoustic low-pass filters},
 volume = {24},
 year = {1958}
}