Jeumont Chopper Prototype | Montreal Metro | MR63 Element 41 | 2015 

It's been years since Montreal's MR63 Jeumont prototype units retired. At least their legacy lives on in the MR73s, which typically only sounds the final 3 notes instead of the 5 (90 Hz, 120 Hz, 180 Hz, 240 Hz, & 360 Hz) from the prototype; though if listened closely the two lower frequencies of the prototype (90 Hz & 120Hz) can still be heard, as seen in this separate video:( • Montreal Metro: MR73 o... )
2015巧遇蒙特婁地鐵傳奇的Jeumont 斬波器測試車其中一組, 已引退多年。
起步會有如法國號的五階音調 (90 Hz, 120 Hz, 180 Hz, 240 Hz, 和 360 Hz)。現行車種的MR73起步時基本上只有三階, 細聽有機會有五階, 但不如測試車大聲。可參考另部影片 ( • Montreal Metro: MR73 o... )
#音階加速