聴音機 ちょうおんき Also written 聴音器 Meanings Noun listening instrument; sound detector; sound locator; acoustic locator; hydrophone Kanji 聴 listen. Read as チョウ. 音 sound. Read as オン. 機 machine. Read as キ. Words containing 聴音機 九〇式大空中聴音機 (きゅうまるしきだいくうちゅうちょうおんき) Japanese war tuba Jinuma: Japanese Dictionary · Word lists