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在雷达之前听的奇怪历史

2018-6-17 14:52| 发布者: dymodel| 查看: 1002| 评论: 0|原作者: sly

摘要: 20世纪30年代 日本皇帝Shōwa检查了三个日本声学定位器,俗称“战争大号”,安装在四轮车上。 图片:公共领域 在第一次世界大战期间,空战变得越来越重要。齐柏林飞艇在英格兰南海岸进行轰炸袭击,双翼飞机被聘为 ...
20世纪30年代
日本皇帝Shōwa检查了三个日本声学定位器,俗称“战争大号”,安装在四轮车上。
图片:公共领域
在第一次世界大战期间,空战变得越来越重要。齐柏林飞艇在英格兰南海岸进行轰炸袭击,双翼飞机被聘为轰炸机。如果他们的方法被发现,战斗机可能会击退敌人或将其击落。
飞机发动机产生了前所未有的声音,因此为了在远处听到它们,战争努力开发了听音装置。有些小而便携,供一个人使用。操作员聆听使用听诊器式耳机。
但是在更远的距离检测发动机噪音使得有更多时间准备响应。大而精密的探测器是实验性的,它们的效率差别很大。一些设计非常引人注目,如日本声学定位器被称为“战争大号”。
它们的使用一直持续到二战初期,但飞机速度的增加和雷达的发展使其已经过时。


在雷达之前听的奇怪历史

原文:1930s
Three Japanese acoustic locators, colloquially known as "war tubas," mounted on four-wheel carriages, being inspected by Japanese Emperor Shōwa.
Image: Public domain
During World War I, aerial warfare became increasingly important. Zeppelin airships conducted bombing raids on the south coast of England, and winged aircraft were employed as bombers by both sides. If their approach was detected, fighter aircraft could head off the enemy or shoot them down.
Aircraft engines produced unprecedented sound, so in order to hear them at a distance, the war efforts developed listening devices. Some were small and portable, for the use of one person. The operator listened using stethoscope-style headphones.
But detecting engine noises at greater distances allowed more time to prepare a response. Large and elaborate detectors were experimental, and their efficiency varied widely. A number of designs were quite striking, such as the Japanese acoustic locators nicknamed "war tubas."
Their use continued until the early years of WWII, but increases in aircraft speeds and the development of radar rendered them obsolete.
在雷达之前听的奇怪历史

1932
Japanese soldiers demonstrate the use of a "war tuba."
Image: Public domain


 
1921
Bolling Air Field horn amplifiers.
Image: Buyenlarge/Getty Images



 
1930s
A sound locator in operating position.
Image: Carl Mydans/The LIFE Picture Collection/Getty Images


 
1930s
An early radar system in operation at an aerodrome in the south of England.
Image: Hulton Archive/Getty Images

 
c. 1925
A pair of enormous amplifiers used by the U.S. Naval Air Service for locating and contacting aeroplanes by day and night.
Image: Hulton Archive/Getty Images



 
c. 1930
An early radar system in operation at an aerodrome in the south of England.

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