The biography of loud speakers from movable coil to modern day
Author: TamaraCohenson
The humble loudspeaker has a rich story to tell with regards to its history, littered with some of the greatest minds of the 20th century such as Thomas Edison, Nikola Tesla and Ernst Siemens. However our story begins with the pioneers of the telephone system where the first real world need for a loudspeaker came to light, after all the telephone wouldn't have become the success it is if we couldn't hear the person on the end of the line! In 1876 Alexander Graham Bell patented the first ever electronic loudspeaker design, as part of his new telephone system which, as we all know now, was a roaring success. It wasn't always plain sailing however, there was some competition to the electronic loudspeaker from a compressed air based solution although this suffered from a poorer quality of sound in comparison.
In the 1930s the first combined speakers began to appear, featuring the standard mid range speaker that we were all used to, but also an additional woofer speaker to produce low frequency sounds and a tweeter speaker that would reproduce the highest frequencies of sound. This multi part approach allowed a single speaker to output a much broader range of frequencies and hence, quality of sound. It was during this period that the first improvements in sound quality were made by isolating the speaker out of the way of external vibrations and echoes, usually upon some sort of makeshift speaker stand.
As demand grew for high quality speakers, they were originally introduced on mass by chains of cinema's who wanted to provide the best possible audio experience for movie goers. Often these large scale audio systems would feature a whole range of woofers, mid range and tweeter speakers, carefully positioned on quality speaker stands that vastly improve the quality of these early speakers. The early pioneer of these larger speaker system was Altec, whose "Voice of the Theatre" system became industry standard in cinemas and movie houses.
These days modern speakers still resemble their early predecessors on the outside, however this is not so true on the inside thanks to the help provided by computer aided design and modern materials and manufacturing methods which have improved the overall quality of sound produced by ten fold and the quality is certainly noticeable.
Article Source: http://www.articlesbase.com/electronics-articles/the-biography-of-loud-speakers-from-movable-coil-to-modern-day-3882818.html
About the Author
Tamara is the author and owner of Speaker Stands and is obsessed with all things audio, with a hand picked range of surround sound speaker stands she can help you find that perfect item.
Plato’s Dialogues
Oedipus Trilogy
Dei Officii (On Duty) by Marcus Tullus Cicero
P.S. – You should look into Shimer College, it’s a place where you read all these great books and get credit for it!
Nikola Tesla’s papers were confiscated when he died. Why? What real threat has ever been established?
“Nikola Tesla died on January 7th, 1943 in Hotel New Yorker, in Manhattan, in room 3327 on the 33rd floor of the hotel. Immediately after Tesla’s death, Tesla scientific papers vanished from his hotel room in Hotel New Yorker. Tesla papers were never found. Tesla papers contained scientific data and information about “Death Rays”, which could be used for military purposes.”
http://www.teslaplates.com/biography_papers.htm
Please try to provide proof that at least an “open-minded skeptic” can read without wincing. I realize SOMETHING was rotten in the state of New York, but WHAT?!
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to –> LITHIUM:::
Perhaps. But the question remains: Why would the papers of a scientist of this magnitude and respect disappear so soon after his death? Tesla would use poetry as freely as calculations, sure. But that doesn’t discount his talents nor the fact that his contributions are indispensable more than a century after he bested Edison.
How is it that Edison’s properties were safer in remote Menlo Park? Was Manhattan some sort of prehistoric backwater by comparison? In 1943? Not likely.
“mmediately after Tesla’s death became known, the Federal Bureau of Investigation instructed the government’s Alien Property Custodian office to take possession of his papers and property, despite his US citizenship. His safe at the hotel was also opened. At the time of his death, Tesla had been continuing work on the teleforce weapon, or death ray, that he had unsuccessfully marketed to the US War Department.
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“It appears that his proposed death ray was related to his research into ball lightning and plasma and was imagined as a particle beam weapon. The US government did not find a prototype of the device in the safe. After the FBI was contacted by the War Department, his papers were declared to be top secret. The so-called “peace ray” constitutes a part of some conspiracy theories as a means of destruction. The personal effects were seized on the advice of presidential advisers, and J. Edgar Hoover declared the case “most secret”, because of the nature of Tesla’s inventions and patents.[91] One document states that “[he] is reported to have some 80 trunks in different places containing transcripts and plans having to do with his experiments [...]“. Charlotte Muzar reported that there were several “missing” papers and property.”
What the devil is in those untold details?
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What word could you fill in?
Hi, I am making a biography on Nikola Tesla and I am jotting down notes of a book that I’m reading. The sentence says “He received over 100 patents”. I am trying to put it in a downgraded sentence but I cant find the right way.
any good books that you can suggest for me?
I am looking for some good books to read, i am 18 years old and i enjoy scientific topics and very creative literature, i am also very fond of stories that look into human nature, books that i have enjoyed so far are; the lord of the rings series, hitchhikers guide to the galaxy series, animal farm, 1984, The man who invented the 21st century (a biography on Nikola Tesla) and mein kampf (yes it was written by an evil man and no, i am not a neo nazi, i just found hitler to be a very interesting character with a lot of genius ideas that were clouded by his evil nature)
The only device known to physics capable of destroying troops, tanks, planes, and building using radiation is a nuclear bomb, which acts in all directions at once.
I find it very hard to believe Tesla invented a nuclear bomb, and equally hard to believe he could somehow direct its energy in a straight line (as a ray, rather than a burst).
Tesla ‘obtained’ or ‘aquired’ almost 300 patents for his inventions and developments.
or
Almost 300 patents were ‘issued’ to Tesla for…..
P.S.
Kind of hard to downgrade Tesla’s accomplishments, except to say he was eccentric.
Nothing is a “guaranteed” success.
Disney was concerned that Johnny Depp was all wrong to play jack Sparrow in the “Pirates of the Carribbean: Black pearl” movie and tried to get him off the project
You also need a real story behind it and a more flexible director (Spielberg is ALL WRONG for this)
Don’t you think there should be a Hollywood Blockbuster made about Nikola Telsa?
If any of you know any reasonable amount of this man’s biography you would realize that a high-end movie about the life of Nikola Tesla would be a guaranteed success.
You would need a solid director like Polanski or Spielberg and a perfect match for Telsa – like Johnny Depp to pull it off.
Does anyone see what I’m getting at hear?
ANAGah.