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The sound spectrograph machine was invented at Bell Telephone Laboratories in the early 1940s. The device remained a military secret until the end of WWII due to its potential use in applications such as underwater surveillance. The first paper describing the device was published in the Journal of the Acoustical Society of America in 1946 by Bell Labs engineers W. Koenig, H.K. Dunn, and L.Y. Lacy (The Sound Spectrograph, J. Acoust. Soc. Am., Volume 18, Issue 1, pp. 19-49). The Kay Elemetics Corporation was soon formed to manufacture and sell the device. The machine was widely used for several decades in analyzing acoustic signals of all kinds, but especially speech and birdsong. The machine was eventually supplanted by software analyzers using methods such as Fourier analysis and linear predictive coding.

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11y ago
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1w ago

The Kay Sonograph was invented by Dr. Raymond Kay in the 1960s. It was a pioneering device for measuring bone density.

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Continue Learning about Archaeology

How is Kay related to Arthur?

The relationship between Kay and Arthur can vary depending on the context. In Arthurian legend, Kay is often portrayed as Arthur's foster brother or adoptive brother. In some versions, Kay is the son of Arthur's foster parents and is raised alongside him as a sibling. In other versions, Kay is Arthur's foster brother through his connection to Sir Ector, who raises both Kay and Arthur as his own sons.


Who is Arthur's brother in the sword in the stone?

Arthur's brother in "The Sword in the Stone" is Kay. He is also known as Sir Kay, a knight in King Arthur's court.


Who does Sir Kay claimed pulled the sword out of the stone?

Sir Kay claimed he pulled the sword out of the stone, but it was actually King Arthur who was able to successfully pull the sword from the stone.


What kind of personality does Sir Kay have in the story the sowrd in the stone?

Sir Kay is depicted as arrogant, self-centered, and brash in "The Sword in the Stone." He is shown as having a sense of entitlement, and often belittles those around him, including his younger brother Arthur. Sir Kay's personality contrasts sharply with Arthur's humble and kind nature.


What is an archetypes in once and future king?

In "The Once and Future King," King Arthur embodies the archetype of the hero. He goes on a journey, faces challenges, and demonstrates noble qualities such as courage, honor, and selflessness. Merlin represents the archetype of the wise old man, serving as a mentor and guide to Arthur throughout his life.

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John Kay was an historical British inventor. He invented the flying shuttle. He was from Walmersley in the United Kingdom.


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John Kay invented the flying shuttle during the year 1733.


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john kay invented the flying shuttle for weaving cloth in 1733.


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Nobody knows only Dr. Kay


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Mary Kay Ash founded Mary Kay Inc. on Friday, September 13, 1963.More info http://www.marykay.com/mimi.belle/default.aspx


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it was invented in England near lancershire is 1733 at john kay;s house