acoumeteryoudaoicibaDictYouDict[acoumeter 词源字典]
"Any of various devices or instruments used to test or measure the sense of hearing", Early 19th cent.; earliest use found in Edinburgh Medical and Surgical Journal. From ancient Greek ἀκούειν to hear + -meter, originally after French acoumètre.[acoumeter etymology, acoumeter origin, 英语词源]