Speaker
A speaker is an electronic device used to transform varying electric current into audible sound. It usually consists of a speaker cone, most often made of plastic or cardboard, which is moved by magnetic forces induced by the electromagnet to which the input signal is directed.
An active speaker contains a built-in amplifier to process low voltage sound signals, while a passive speaker requires an external amplifier.
The most important properties of a speaker are its impedance (expressed in ohms), power handling capability (in watts), and its frequency output range, which determines the range of sounds the speaker is able to produce.
See also: loudspeaker
The "Speaker" (more formally, Speaker of the House) is the presiding officer in many legislative bodies, including the United States House of Representatives and the House of Commons in Westminster System parliaments. See Speaker of the House of Commons.
Referenced By
1980 in Canada | 38th Parliament of Ontario | Adi Koila Mara Nailatikau | Alvin Curling (Canadian politician) | Bank of Ireland, College Green | Car audio | Car stereo | English Civil War | English Revolution | Epeli Nailatikau | Ernest Eves | Ernie Eves | Great Rebellion | HMAS Junee | Irish Houses of Parliament | Irish Parliament House | John 'Mad Jack' Fuller | Nebraska Legislature | Puritan Revolution | Romeo LeBlanc | Roméo-A. LeBlanc | Roméo LeBlanc | Social Democratic Party of Finland | Speaker of the British House of Commons | Speaker of the United Kingdom House of Commons | Suomen Sosiaalidemokraattinen Puolue | Suomen Sosialidemokraattinen Puolue | The Old Parliament House | Title
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