I found out that these were actually early warning devices used in the war before radar was used. It enhanced the listeners ability to detect incoming airplane engines.
I didn't say 'before it was invented' above because I understand it was offered to the war department and could have avoided Pearl harbor if it had been used. The war department drug its feet and wanted to think about the invention.
EH??
ReplyDeleteI'm certainly glad that hearing aids have gotten smaller over the years:)
ReplyDeleteI found out that these were actually early warning devices used in the war before radar was used. It enhanced the listeners ability to detect incoming airplane engines.
ReplyDeleteI didn't say 'before it was invented' above because I understand it was offered to the war department and could have avoided Pearl harbor if it had been used. The war department drug its feet and wanted to think about the invention.
They can also be used for making clouds;-) Kate Bush - Cloudbusting - Official Music Video
ReplyDelete