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The acoustic frequencies used in sonar systems vary from very low to extremely high . The study of underwater sound is known as underwater acoustics or hydroacoustics. The first recorded use of the technique was in 1490 by Leonardo da Vinci, who used a tube inserted into the water to detect vessels by ear. [6]
The year shown may represent a patent or other developmental milestone rather than the first use in public. Technologically identical systems may have been promoted under different trade names by different commercial entities. The approximate number of films credited to each system is taken from the Internet Movie Database.
In the first decades of the 20th century, movies grew much longer and the medium quickly developed into one of the most important tools of communication and entertainment. The breakthrough of synchronized sound occurred at the end of the 1920s and that of full color motion picture film in the 1930s (although black and white films remained very ...
The use of the intertitle to explain actions and dialogue on screen began in the early 1900s. Filmed intertitles were first used in Robert W. Paul's film, Scrooge, or Marley's Ghost. [54] In most countries, intertitles gradually came to be used to provide dialogue and narration for the film, thus dispensing the need for narration provided by ...
Able Edwards, the first movie with all-CGI backgrounds and live actors. [125] The Polar Express by Robert Zemeckis, the first film to entirely use the performance capture technique, whereby the physical movements of the actors are digitally recorded and then translated into a computer animation. [120] [126]
Nineteen-thirty-one also saw the first Bengali-language film, Jamai Sasthi, and the first movie fully spoken in Telugu, Bhakta Prahlada. [ 113 ] [ 114 ] In 1932, Ayodhyecha Raja became the first movie in which Marathi was spoken to be released (though Sant Tukaram was the first to go through the official censorship process); the first Gujarati ...
Sound on film can be dated back to the early 1880s, when Charles E. Fritts filed a patent claiming the idea. In 1923 a patent was filed by E. E. Ries, for a variable density soundtrack recording, which was submitted to the SMPE (now SMPTE), which used the mercury vapor lamp as a modulating device to create a variable-density soundtrack.
First use of digital 3-D computer graphics for animated hand and face. Used 2-D digital compositing to materialize characters over a background. [17] Hobart Street Scene: First use of a 3-D hidden-line removal movie depicting an architectural street scene. [22] [23] It shows the planned Crown Courts in Hobart in 1976 and was used for planning ...