Garreth Lee, Seow Jing Ye, Haonan Yu. An electroacoustic transducer that produces sound in response to an electrical audio signal input Common loudspeaker.

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Presentation transcript:

Garreth Lee, Seow Jing Ye, Haonan Yu

An electroacoustic transducer that produces sound in response to an electrical audio signal input Common loudspeaker uses a paper cone supporting a voice coil electromagnet acting on a permanent magnet

First origin of loudspeaker was by Johann Philipp Reis who installed an electric loudspeaker in his telephone in 1861 Thomas Edison followed to use compressed air as an amplifying mechanism for his early cylinder phonographs

To translate an electrical signal into an audible sound, speakers contain an electromagnet – a metal coil creating a magnetic field when an electric current flows through it. This coil behaves much like a permanent magnet, with one particularly handy property: reversing the direction of the current in the coil flips the poles of the magnet.

Tweeter Mid-range Driver Woofer Subwoofer Driver Full-range Driver Dynamic loudspeaker Horns