Variable Voltage Variable Frequency Control: this is the common name for electric cars, such as the early generation of electric cars having a function which produces sounds similar to the sound of yurei heard in kabuki or period dramas (a name familiar in the railway industry).
可変電圧可変周波数制御：初期の可変電圧可変周波数制御電車など、歌舞伎や時代劇における幽霊の効果音のような走行音（励磁音）を出す電車を指した俗称（鉄道関係の俗称）。