The Following Secrets of Stalin's Soviet Prisons are revealed in SWORD OF THE TURUL, based on a survivor's memoirs and recollections ...
Prisoners kept in the secret special section were bombarded with ultrasonic sounds in different languages.
The ultrasonic sounds would often be based on what the NKVD operators of the system had learned from the hidden microphones in the cells.
Not all prisoner interrogations were recorded.
“Trials” were at night and defendants were not given a chance to speak.
Kitchen helpers were believed by many to be prison informants.
The worst prison was Lefortovo. Lubyanka was considered less dingy.
Vladimir prison, the maximum security prison for high profile prisoners, was where the Soviets secretly held members of the anti-Nazi resistance from World War II - and even an American they'd abducted in Vienna, Austria.
Excerpt From SWORD OF THE TURUL, by Catherine Eva Schandl
(all rights reserved):
"I knew that the sounds were the product of an outside source, and not creations of my own, because I heard them initially in Russian, a language I did not understand or speak at the time.
When food was distributed, they came with different pots, and the sergeant watched carefully that every prisoner should get the type of food prescribed for him ..." (Karoly William Schandl)