Acoustic measurements undertaken on APT-E train in December 1973 and Jan 1974 (IM-NOY-046)

During the last series of running tests (December/January 1973/4) a survey of the noise and vibration levels on APT-E was carried out. The object of this work was to gather comprehensive data on the external and internal acoustic environment of E-train. The proposed schedule of work (Ref 1) had to...