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GCSE     Transducer     Battery     Bulb     Buzzer     Driver     >Loudspeaker<     Microphone     Motor     Neon     Piezoelectric Sounder     Servo     Seven Segment     Solenoid    

Transducer Loudspeaker


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  GCSE    Transducers  0 of 12    Question 252    Components 
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Deadline not set9 of 12    Question 1501    Transducer Buzzer 
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Deadline not set10 of 12    Question 266    Transducers 
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Input: An alternating electric current.
Output: Pressure waves in air. These are sound waves.

Loudspeaker

Speakers have a moving coil suspended in a strong magnetic field. When alternating currents flow in the speaker's moving coil, forces are produced which cause the paper cone to vibrate in step with the alternating currents. The paper cone movements cause the surrounding air to move and sound waves are produced.

This diagram shows the structure of a speaker. Its structure is identical to a moving coil microphone but the speaker is much bigger and able to handle large currents to make loud sounds.

The Microphone Structure is Identical to the Loudspeaker

Loudspeakers emit sound when an alternating current passes through them. The air pressure waves produced by the speaker are proportional to the current flowing through the speaker.

Loudspeakers are ...

There are speakers and there are SPEAKERS

The "empty boxes" delay and channel the energy from behind the speakers, almost doubling the bass output towards the audience.

Dub-I-Land Soundsystem @ Lorrainepark 22. June 2013

 

It seems to be necessary to tie these speakers down to stop them walking away!

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