@article{oai:nagoya.repo.nii.ac.jp:00019634,
 author = {岩井, 章 and 伊藤, 吉之助 and 田中, 津太雄 and 村田, 友司 and 加藤, 利郎 and IWAI, Akira and ITO, Kichinosuke and TANAKA, Tsutao and MURATA, Tomoji and KATO, Toshio},
 issue = {1},
 journal = {空電研究所報告},
 month = {Oct},
 note = {To study the nature and origin of the whistling atmospherics we are devising an apparatus which consists of a preamplifier, a main-amplifier, low and high pass filters, a magnetic tape recorder of two elements and a frequency analyser. The whistlers are received by means of a straight amplifier with an available gain of 50-100 db, its input being connected to a vertical antenna and its output to a magnetic tape recorder. The frequency response is limited by filters from 300 c/s to 15 kc/s. Routine observations of this measuring set will be opened from next year.},
 pages = {35--39},
 title = {可聴周波空電観測装置 (I)},
 volume = {5},
 year = {1954}
}