the notes of the sound are an aduio illision for lack of a better word. the three notes heard are all rising, while the first three notes of the other section are two rises and a drop.
I'm not sure, Larry. I know it's an AC transformer that makes that noise; the old trains ran on standard subway power (600vDC) but the new ones need AC for all the computerized nonsense. You hear those tones as the train is running too, but they tend to stay constant.
Very cool. Nice work, Ken. I am curious about those tones....The power curve for starting a train smoothly is a complicated process. The trolleys in Philly originally had a jerk start and the designers had to use the 4th derivative ("jerk" derivative) to solve the problem. I suspect the tones are a clue to the required torque at the wheels for a smooth powerful start. Larry
I have been fortunate to ride the Subway in Berlin, (U-Bahn) Paris (Métro) and London (The Tube). Although I havent been back in 10 years, NYC will always be home.
Rofl
SuperCoolDude2014 4 weeks ago
like it. good work
itsaguinness 1 year ago
the notes of the sound are an aduio illision for lack of a better word. the three notes heard are all rising, while the first three notes of the other section are two rises and a drop.
metropod 2 years ago
More atonal than I usually like in music, but I thought it was/is still very cool.
Tr1sh4Lynn 2 years ago
I'm not sure, Larry. I know it's an AC transformer that makes that noise; the old trains ran on standard subway power (600vDC) but the new ones need AC for all the computerized nonsense. You hear those tones as the train is running too, but they tend to stay constant.
ficara 2 years ago
Very cool. Nice work, Ken. I am curious about those tones....The power curve for starting a train smoothly is a complicated process. The trolleys in Philly originally had a jerk start and the designers had to use the 4th derivative ("jerk" derivative) to solve the problem. I suspect the tones are a clue to the required torque at the wheels for a smooth powerful start. Larry
locustvalleystring 2 years ago
I have been fortunate to ride the Subway in Berlin, (U-Bahn) Paris (Métro) and London (The Tube). Although I havent been back in 10 years, NYC will always be home.
Thank you for this. ★★★★★ !
Greg
GregQzag 3 years ago
cool!
UncleVRoy 3 years ago