Speaker PNG Transparent Images

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License Info: Creative Commons 4.0 BY-NC


Submitted by on Jul 9, 2022

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A speaker driver is a transducer that turns an electrical audio stream into sound waves in a loudspeaker. While the word is frequently used interchangeably with loudspeaker (speaker), it refers to specialized transducers that only reproduce a subset of the audible frequency range. Multiple loudspeakers are frequently installed in the same enclosure for high-fidelity sound reproduction, each rendering a separate section of the audible frequency range. Individual speakers are referred to as drivers in this situation, while the overall equipment is referred to as a loudspeaker. Tweeters are used to reproduce high audio frequencies, mid-range drivers are used to reproduce middle frequencies, woofers are used to reproduce low frequencies, and subwoofers are used to reproduce very low bass frequencies. Supertweeters and rotary woofers are less prevalent types of drivers.

The dynamic or electrodynamic driver, created in 1925 by Edward W. Kellogg and Chester W. Rice, is the most extensively used mechanism in speakers to convert electric current to sound waves. It makes sound by suspending a coil of wire called a voice coil between the poles of a magnet. Others, such as electrostatic drivers, piezoelectric drivers, planar magnetic drivers, Heil air motion drivers, and ionic drivers, are significantly less commonly utilized.

A speaker driver is a transducer that turns an electrical audio stream into sound waves in a loudspeaker. While the word is frequently used interchangeably with loudspeaker (speaker), it refers to specialized transducers that only reproduce a subset of the audible frequency range. Multiple loudspeakers are frequently installed in the same enclosure for high-fidelity sound reproduction, each rendering a separate section of the audible frequency range. Individual speakers are referred to as drivers in this situation, while the overall equipment is referred to as a loudspeaker. Tweeters are used to reproduce high audio frequencies, mid-range drivers are used to reproduce middle frequencies, woofers are used to reproduce low frequencies, and subwoofers are used to reproduce very low bass frequencies. Supertweeters and rotary woofers are less prevalent types of drivers.

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The dynamic or electrodynamic driver, created in 1925 by Edward W. Kellogg and Chester W. Rice, is the most extensively used mechanism in speakers to convert electric current to sound waves. It makes sound by suspending a coil of wire called a voice coil between the poles of a magnet. Others, such as electrostatic drivers, piezoelectric drivers, planar magnetic drivers, Heil air motion drivers, and ionic drivers, are significantly less commonly utilized.

A signal is transferred to the voice coil through electrical wires, from the amplifier via speaker cable, and then to the moving coil by flexible tinsel wire. As the electrical signal changes, the current generates a magnetic field that causes the diaphragm to be alternately pushed one way or the other by the magnetic field created by current flowing in the voice coil, against the field formed in the magnetic gap by the stationary magnet structure. The back-and-forth action causes pressure differentials in the air in front of the diaphragm, which move away as sound waves.

For movements away from the balanced position established when the driver was constructed at the factory, the spider and surround operate as a spring restoring mechanism. Furthermore, each helps to restoring the voice coil to a crucial position inside the magnetic gap, neither toward one end nor the other, both concentrically within the magnet assembly and front-to-back.

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