According to International Standards Organization (ISO) information, grid of noise rating numbers (NRN) was used by British Railways (BR); noise level is taken as 60 for luxury and sleeper coaches, 65 for dining and long distance coaches, and 70 for suburban stock; use of fiberglass insulation, special brakes and light, good-riding trucks incorporating light wheels, quiet brakes, noise insulating suspension components will be obvious requirement; effective insulation of windows and doors will require adoption of double panes and well-sealed doors of substantial construction.
Development of British railways coach insulation
Ry Gaz
Railway Gazette ; 123 , n 11
1967
5 pages
Article (Journal)
English
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