Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) ICHIMIYA Ryoichi and SAKAMOTO Syuichi,A new measuring method of displacement and position by means of variations of sound frequency and air column in a small pipe. (Relationship between active end correction and transit angle).,TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C,03875024,The Japan Society of Mechanical Engineers,1988,54,499,651-655,https://cir.nii.ac.jp/crid/1390282681332532096,https://doi.org/10.1299/kikaic.54.651