GERMAN UNDERWATERS ORDNANCE MINES |
Chapter 11 - INFLUENCE MINE UNITS - SVK AND LUFTWAFFE |
Section 6 - SUPERSONIC UNITS |
AA 106 UNIT |
Acoustic Triggering Circuit. The acoustic triggering circuit is designed to switch on the supersonic circuit when ship moies are erected. It is very simple, and consists of a microphone, transformer, rectifier, and relay. The frequencies used are in the 200-500 cps. range. The acoustic triggering system is so arranged in the circuit that continuous acoustic signal is necessary to keep the supersonic energized. |