防ぼう音おん性せいMeaningsNoun1. sound absorption; sound insulating propertiesKanji used防prevent音sound性nature (of a person)Composed of防ぼう音おんsoundproofingNoun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun