Carl Laemmle[?] of Paramount experiments with combining audio from phonographs with film. Laemmle's experiements lead to the German development of "Syncroscope." "Syncroscope" had several successful demonstrations, but was eventually abandoned.
... for the most part, abandoned.
Aldwych tube station
Blake Hall tube station[?]
British Museum tube station[?]
Brompton Road tube station[?]
City Road tube ...