きゅうまるしきだいくうちゅうちょうおんき 九〇式大空中聴音機 LinksSentence search for 九〇式大空中聴音機Sentence search for きゅうまるしきだいくうちゅうちょうおんきKanji details for 九, 式, 大, 空, 中, 聴, 音 and 機Edit in JMdict Noun1. Japanese war tuba; pre-radar acoustic locator used by the Imperial Japanese ArmyHistorical term Discussions Log in to talk about this word.