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In 1910 Manhattan, Victoria Van Brett, a bitter spinster heiress lives an isolated life with her sister Caroline. Her domineering urges go into overdrive when their half-brother Rip brings a new bride home to the family’s gloomy Fifth Avenue mansion, built by their late industrialist father. The title refers to a secret soundproofed chamber that the villainess uses to entrap her enemies.
Featured Crew
| Gladys Lehman | Screenplay |
| Jack Cunningham | Screenplay |
| Charles Vidor | Director |
| Harry Fischbeck | Director of Photography |
| Elizabeth A. McFadden | Theatre Play |
| E. Lloyd Sheldon | Producer |
| James Smith | Editor |
| Fred Mayer | Camera Operator |
| Robert Odell | Art Direction |
| Hans Dreier | Art Direction |