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A loudspeaker or speaker, is an electromechanical transducer which converts an electrical signal into sound. The term loudspeaker is used to refer to both the device itself, and a complete system consisting of one or more loudspeaker drivers (as the individual units are often called) in an enclosure. The loudspeaker is the most variable element in an audio system, and is responsible for marked audible differences between systems.
History
Alexander Graham Bell patented the first loudspeaker as part of his telephone in 1876. This was soon followed by an improved version from Ernst Siemens in Germany and England (1878). Nikola Tesla is believed to have created a similar device in 1881 The modern design of moving-coil loudspeaker was established by Oliver Lodge in England (1898). [http://history.acusd.edu/gen/recording/loudspeaker.html The moving coil principle was patented in 1924 by two Americans, Chester W. Rice and Edward W. Kellog. There is some controversy in that an application was made earlier by the Briton Paul Voigt but not granted until later. Voigt produced the first effective full range unit in 1928, and he also developed what may have been the first system designed for the home, although using electromagnets rather than permanent magnets.
More on [ Loudspeaker ]
RT @NealSchaffer Today's #gov25 speakers include @nealschaffer @bobfine @BeverlyMacy @Lifes_Dash @drdigipol @TechCzar @BeyondSearch @TheFix
rorycooper (Rory Cooper) Mon, 14 Dec 2009 13:25:21 -0000
RT @NealSchaffer Today's #gov25 speakers include @nealschaffer @bobfine @BeverlyMacy @Lifes_Dash @drdigipol @TechCzar @BeyondSearch @TheFix
Public speakers: National Summit On Interpersonal Violence and Abuse Across the Lifespan deadline extended http://bit.ly/4SBwzc
CharliJane (Wendi McNeill) Mon, 14 Dec 2009 13:24:57 -0000
Public speakers: National Summit On Interpersonal Violence and Abuse Across the Lifespan deadline extended http://bit.ly/4SBwzc
Our school speakers are playing Britney Spears christmas music...score.
kjbrdar (Kylie ) Mon, 14 Dec 2009 13:22:47 -0000
Our school speakers are playing Britney Spears christmas music...score.
Saturday Times magazine give five reasons why they love the Pioneer XW-NAS5 iPod speakers. Check it out: http://tinyurl.com/yasm4vz asm4vz
PioneerUK (Pioneer UK) Mon, 14 Dec 2009 13:22:38 -0000
Saturday Times magazine give five reasons why they love the Pioneer XW-NAS5 iPod speakers. Check it out: http://tinyurl.com/yasm4vz asm4vz
Think audience members at conferences need [citation needed] banners for when speakers are pulling stats out of nowhere.
iamdanw (Dan) Mon, 14 Dec 2009 13:21:53 -0000
Think audience members at conferences need [citation needed] banners for when speakers are pulling stats out of nowhere.
@mj7757 RE longest day: left help for you here: tinyurl.com/y9xmpbe â you'll need speakers
nickpagee (nick pagee) Mon, 14 Dec 2009 13:20:49 -0000
@mj7757 RE longest day: left help for you here: tinyurl.com/y9xmpbe – you'll need speakers
eBuying Guides: Where to Buy Speakers/Headphones - Concentrates on where to shop for products, but also has staff-produced buying guides. Some of the guides are links to other buying guide sites.
Meta Description: [ Buying guide for Speakers/Headphones ]
Epinions: Computer Speakers - Comparisons and reviews written by consumers.
Meta Description: [ Epinions has the best comparison shopping information on Computer Speakers. Compare prices from across the web and read reviews from other consumers on Computer Speakers before you decide to buy. ]
Epinions: Speakers - Consumer-generated reviews, buying tips and advice, ratings, price information, and searchable in a variety of ways from price to product type.
Meta Description: [ Epinions has the best comparison shopping information on Speakers and Subwoofers. Compare prices from across the web and read reviews from other consumers on Speakers and Subwoofers before you decide to buy. ]
High Efficiency (Exponential) Loudspeaker Set For Disco Application - Physics principles, calculations, drawings, specifications, pictures, and internet resources/references. PDF version of the site available as well.
ReviewCentre.com: Speaker Reviews - Consumer reviews on speakers.
Meta Description: [ Review Centre has reviews of Stereo Speakers so that you can get all the latest up-to-date information, and links to buy. Because we provide unbiased consumer reviews you will know which Hi Fi Stereo Speakers best meets your needs. ]
Subwoofers - What You Need To Know - Explains types, crossovers, alternatives, shopping and installation tips.
Meta Description: [ Subwoofers have emerged as a critical element of a home theater system. What is a subwoofer and why is it necessary for a full home theater experience? Find out in this informative article. ]
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