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en.wikipedia.org/wiki/Japanese_war_tuba

Acoustic location is the use of sound to determine the distance and direction of its source or reflector. Location can be done actively or passively, and can take place in gases (such as the atmosphere), liquids (such as water), and in solids (such as in the earth).

www.badscience.net/2006/08/japanese-war-tubas

Japanese War Tubas, only a few decades ago, were the very pinnacle of modern technology, and your best bet for locating an enemy in the distance, or in the dark (that’s Hirohito on the right). badscience » Japanese War Tubas […] BorisTheChemist said, May 26, 2006 at 10:55 am. Wow! Something that combines my two passions Science and Brass ...

www.reddit.com/r/HistoryPorn/comments/201g4z/japanese_war_tuba_an_acoustic...

Japanese "war tuba". An acoustic location device used to locate enemy aircraft prior to the invention of radar. ~1930s [1024x768] ( i.imgur.com ) submitted 5 years ago by cobb__salad

en.wikipedia.org/wiki/Tuba

The tuba (/ ˈ tj uː b ə /; Italian: ) (bass) is the largest and lowest-pitched musical instrument in the brass family.As with all brass instruments, the sound is produced by lip vibration into a large mouthpiece.It first appeared in the mid-19th century, making it one of the newer instruments in the modern orchestra and concert band.The tuba largely replaced the ophicleide.

www.pinterest.com/mauricewmr/war-tubas

Japanese War Tuba - Photograph featuring two Japanese acoustic locators mounted on carriages, taken in the The Dimple Maker The flying bicycle Robot answering machine The Japanese “war tuba” was used to located enemy aircraft by sound - Funny - Check out: Wacky inventions from the old days on Barnorama

mashable.com/2015/02/16/war-tubas-radar-wwi

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 ...

www.reference.com/history/invented-tuba-fb7c814f691fcafb

Who Invented the Tuba? The first tuba was invented by Edme Guillaume in 1590. It was made of wood and leather. The modern tuba is the creation of Wilhelm Wieprecht and Johann Gottfried Moritz in 1835. The tuba was created as a way of adding a deep bass element to musical groups. The design of the instrument went through various incarnations as ...

bizarrevictoria.wordpress.com/2013/07/10/war-tubas

They were big in WWI. The above picture is of Japanese war tubas in the 1930s, but the technology itself was a much earlier invention by Hoboken physics professor A.M. Mayer in 1880 (this is what I have gathered from my brief research–let me know if his info is wrong, or if someone before him actually invented these).

www.timetoast.com/timelines/history-of-the-tuba-93d37d70-b31a-43b4-adf2-55cbb...

History of the Tuba ... A predecessor of the modern tuba, the serpent was invented by Edme Guillaume in France. This was a low instrument, being in the same octaves as a tuba, however unlike its decendants it is made from wood or ivory instead of brass. None the less, it still forms the backbone for the modern day tuba, as it was the first of ...

www.ebaumsworld.com/pictures/37-crazy-inventions-of-the-past/84530426

37 Crazy Inventions of the Past. Featured 03/31/2015 in creepy. To this day, these products remain way ahead of their time. We may never come around. Share ... The Japanese "war tuba" which was used to locate enemy aircraft by sound prior to the invention of radar. 6. The motorbike powered boat. 7. The 1961 Buick "Flamingo" with a rotating ...