Results of extended series of tests made by Underground Elec. Rys. of Lond. Methods developed for preventing noise from entering cars; sound-absorbing material placed in roof, walls and floor; heavy closed windows, special ventilators and shrouding of trucks are principal features incorporated in new cars.
Reducing noise in train operation
Elec. Ry. Jl
Electric Railway Journal ; 63 , n 4 ; p 135-138
1924
4 pages
Article (Journal)
English
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