History of voice coil of a speaker Research Paper

History of voice coil of a speaker - Research Paper Example A voice coil in a speaker is the loop of a wire connected to the top side of a loudspeaker conduit. Its main function is to give the motive force to the conduit by use of magnetic field created by current passing through it. The common loudspeaker that is currently in use was developed in the 1920s and uses a magnetic force to move a coil that is attached to a diaphragm. Information passing capabilities of a system through a magnetic-core, memory circuits and peripheral magnetic storage and retrieval devices was a challenge that faced traditional scientists. Although the history of voice coil technologies is particularly complex and tumultuous. Voice coil has been made in linear and rotary designs, but the rotary design has become the dominant design because it requires less space (Kamm, 1996). A much less expensive mechanism is a stepper motor, in which a shaft rotates in discrete steps to new positions in response to changes in the surrounding magnetic field. The functioning of the voice coil and related associates is closely related to the history of magnetism. It is recorded that around 1820’s a scientist, Hans Christian, demonstrated that magnetism was linked to electric current through the use of a wire carrying an electric current close to a magnetic field. This caused a deflection of the compass needle, which was being used at the tim e of the experiment (Schilders, Vorst, & Rommes, 2008). It is important to note that current flows causes the emergence of a magnetic field in the neighboring field. The history of voice coil indicates how abstract scientists ideas of this device has been ongoing since the invention of magnetism. Before any concrete advances could be made utilizing magnetism, scientists needed new tools and techniques that could be used to hear sound from a speaker (Brauer, 2006). One of the challenge was an inability to construct novel experimental materials with the