Japanese War Tuba
Encyclopedia
The Japanese war tuba is a colloquial
name sometimes applied to Imperial Japanese Army
acoustic locator
s due to the visual resemblance to the musical tuba
. The name derived from a misidentification, possibly in jest, of a historical photo from the 1930s featuring the Japanese emperor Shôwa
inspecting the acoustic locators with anti-aircraft guns in the background.
to the early years of World War II
for the passive detection of aircraft
by picking up the noise of the engine
s. It was rendered obsolete before and during World War II by the introduction of radar
, which was far more effective.
Some examples of concrete acoustic location mirrors
can still be found on the seacoast of Britain to this day.
Colloquialism
A colloquialism is a word or phrase that is common in everyday, unconstrained conversation rather than in formal speech, academic writing, or paralinguistics. Dictionaries often display colloquial words and phrases with the abbreviation colloq. as an identifier...
name sometimes applied to Imperial Japanese Army
Imperial Japanese Army
-Foundation:During the Meiji Restoration, the military forces loyal to the Emperor were samurai drawn primarily from the loyalist feudal domains of Satsuma and Chōshū...
acoustic locator
Acoustic location
Acoustic location is the science of using sound to determine the distance and direction of something. Location can be done actively or passively, and can take place in gases , liquids , and in solids .* Active acoustic location involves the creation of sound in order to produce an echo, which is...
s due to the visual resemblance to the musical tuba
Tuba
The tuba is the largest and lowest-pitched brass instrument. Sound is produced by vibrating or "buzzing" the lips into a large cupped mouthpiece. It is one of the most recent additions to the modern symphony orchestra, first appearing in the mid-19th century, when it largely replaced the...
. The name derived from a misidentification, possibly in jest, of a historical photo from the 1930s featuring the Japanese emperor Shôwa
Hirohito
, posthumously in Japan officially called Emperor Shōwa or , was the 124th Emperor of Japan according to the traditional order, reigning from December 25, 1926, until his death in 1989. Although better known outside of Japan by his personal name Hirohito, in Japan he is now referred to...
inspecting the acoustic locators with anti-aircraft guns in the background.
Acoustic location
Acoustic location was used from mid-World War IWorld War I
World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...
to the early years of World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
for the passive detection of aircraft
Aircraft
An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.Although...
by picking up the noise of the engine
Engine
An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat which is then used to create motion...
s. It was rendered obsolete before and during World War II by the introduction of radar
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...
, which was far more effective.
Some examples of concrete acoustic location mirrors
Acoustic mirror
An acoustic mirror is a passive device used to reflect and perhaps to focus sound waves.- Overview :Prior to World War II and the invention of radar, acoustic mirrors were built as early warning devices around the coasts of Great Britain, with the aim of detecting airborne invasions...
can still be found on the seacoast of Britain to this day.