Mine Explodes by Sound From Ship's Engines

Item

Acoustic mines are now being used by Germany in attempts to block English coastal waers, Prime Minister Churchill disclosed recently. Laid by night in the approaches to harbors, the latest mines are equipped with sound-detectors that pick up sound waves from a ship’s engines. The vibrations act on a vibrating reed, producing electrical impulses, and when these become powerful enough, due to the nearness of the ship, they set off the explosive charge contained by the mine.

Title (Dublin Core)
Mine Explodes by Sound From Ship's Engines
Subject (Dublin Core)
en
en
Article Title and/or Image Caption (Dublin Core)
Mine Explodes by Sound From Ship's Engines
Language (Dublin Core)
Eng
Temporal Coverage (Dublin Core)
World War II
Date Issued (Dublin Core)
1942-02
Is Part Of (Dublin Core)
Popular Mechanics, vol. 77, n. 2, 1942
pages (Bibliographic Ontology)
33
Rights (Dublin Core)
Public domain
Source (Dublin Core)
Google books
References (Dublin Core)
Germany
England
Winston Churchill
Archived by (Dublin Core)
Enrico Saonara