Kids Should Know the Facts of Loudspeakers?
A loudspeaker, which is also called a loud-speaker or speaker, is an item that is used to create the sound in radios, television sets, and electric musical instrument amplifier systems.
How it works
Loudspeakers use both electric and mechanical principles to convert an electrical signal from a radio, television set or electric musical instrument into sound. For a loudspeaker to produce sound, the signal from the radio, television set, or electric musical instrument needs to be connected to an electronic amplifier.
Loudspeakers are usually built by using a stiff paper cone, a coil of thin copper wire, and a circular magnet. The cone, copper wire, and magnet are usually mounted in a rectangle-shaped wood cabinet. The coil of copper wire moves back and forth when an electrical signal is passed through it. The coil of copper wire and the magnet cause the rigid paper cone to vibrate and reproduce sounds.
Inside the loudspeaker can be an audio crossover.
The pillows that we know now are so much different from the first pillows used by mankind. This is not only true for the materials used and their appearance; pillows now have functions other than being used as a headrest.
Types of loudspeakers
Some loudspeakers are designed for lower-pitched sounds, such as woofer loudspeakers or subwoofer loudspeakers. Other loudspeakers, which are called tweeters, are designed to reproduce high-pitched sounds (such as the sound of a whistle or a bird singing).
Loudspeakers for electric musical instruments are usually much stronger and heavier than loudspeakers for radios or television sets. Their main function is to convert electrical signals given to it into sound signals.
Alexander Graham Bell invented the first audible loudspeaker in 1876. Bell invented the loudspeaker because he needed a device that would amplify sound for the telephone. In 1878, the inventor Werner von Siemens from Germany patented an improved type of electrodynamic loudspeaker which did not yet include an amplifier.
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