9. The sound of a Jubilee line train
Thwunk. Hisssss. PsscchhHEEEEEE…schheeschheeschhEEEEEE…
It’s impossible to properly put into words. It’s a whirr and a hum and a whoosh and a purr rolled into one. It’s cosy and charming and not a little thrilling. And it goes like this:
150 great things about the Underground 
It’s the repeated whirr – the noise that comes twice – that I love. The descending note that repeats itself as the train stops is pretty special too.
Because the sound of the auxiliary converters on the 96TS beats the 95TS hands down. *thumbs up*
i find it relaxing. the new central line trains sound nice as well
The noise of a Central line leaving the station reminds me of my shower starting up.
The Central line trains starting up sound just like my shower!
That’s the howl from GTO thyristors. Once you recognise it there you will find it in other places, like the class 323 mainline trains. Unfortunately newer designs no longer make this noise. One day it will be gone as a more efficient IGBT system replaces it, like on the Northern line.