How does a loudspeaker work using motor effect?
A current carrying conductor placed in a magnetic field experiences a force.
When the current varies, the conductor experience a variable force and the conductor moves according to the strength of the current.
In a loud speaker, a coil of wire is placed surrounding a magnet. The coil is attached to a paper cone.
The current which is proportional to the audio signal is passed through the coil and the coil and paper cone vibrates according to the strength of the current. It produces sound according to the signal current.
March 19th, 2010 at 10:17 am
A current carrying conductor placed in a magnetic field experiences a force.
When the current varies, the conductor experience a variable force and the conductor moves according to the strength of the current.
In a loud speaker, a coil of wire is placed surrounding a magnet. The coil is attached to a paper cone.
The current which is proportional to the audio signal is passed through the coil and the coil and paper cone vibrates according to the strength of the current. It produces sound according to the signal current.
References :
March 19th, 2010 at 10:31 am
Maybe you are talking about a "Leslie" loudspeaker.
From Wikipedia: "The Leslie speaker consists of two driver units – a treble unit with horns, and a bass unit. The key feature is that the horns of the treble unit (actually only one working horn, but a dummy horn is used to counter-balance it) and a sound baffle for the bass unit are rotated using electric motors to create ‘Doppler effect based’ vibrato, tremolo and chorus effects."
References :
http://en.wikipedia.org/wiki/Leslie_speaker