Speaker

loudspeaker

 or speaker

Components of a loudspeaker. Electrical signals sent through the coil cause it to act as an …

(credit: © Merriam-Webster Inc.)

In sound reproduction, device for converting electrical energy into acoustical (sound) signal energy that is radiated into a room or open air (see acoustics). The part of the speaker that converts electrical into mechanical energy is frequently called the motor, or voice coil. The motor vibrates a diaphragm that vibrates the air in immediate contact with it, producing a sound wave corresponding to the pattern of the original speech, music, or other acoustic signal.

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speaker

A device that converts analog audio signals into the equivalent air vibrations in order to make audible sound. Although CRT usage has faded, speakers designed for computers are shielded to avoid magnetic interference with the CRT's magnetic coil.

Getting Better All the Time
Starting in the 1990s, vendors began to offer higher-quality computer speakers. Similar to home theater and stereo systems, many computer speaker systems include a pair of small speakers for the midrange and high (treble) frequencies and a large subwoofer for the low end (bass). The small speakers are placed in a left/right stereo orientation, while the subwoofer can be located anywhere on the floor because bass signals are omnidirectional. See sound card and subwoofer.

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Speaker

the presiding officer in any of numerous legislative bodies, including the House of Commons in Britain and Canada and the House of Representatives in the US, Australia, and New Zealand

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speaker [′spēk·ər]

(engineering acoustics)

loudspeaker

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1.	(hardware)	speaker - loudspeaker.
2.		speaker - The person who is (assumed to be) talking.

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Speaker 

the leader of the lower house (or of a unicameral parliament) in the parliaments of some bourgeois countries. The office was first introduced in 1377 in England. It was subsequently adopted by the parliaments of countries belonging to the British Empire, such as Australia, Canada, New Zealand, Ireland, India, Malaysia, Kenya, and Liberia. Although the speaker is officially elected, he is actually appointed by a faction of the majority. The speaker directs discussion in parliament, interprets rules of procedure, and oversees the officials of the house. He is the official representative of the house in dealings with the executive power.