phon
n.（名词）A unit of apparent loudness, equal in number to the intensity in decibels of a ,000-hertz tone judged to be as loud as the sound being measured.方（响度级的单位）：一种表现声音的单位，在数量的上等于把000赫兹声音作测星音时的分贝强度
来源：German 德语 from Greek phônô [sound] * see phone 源自 希腊语 phônô [声音] *参见 phone
