how does the electrical energy is converted into sound energy in loud speakers?

Answer 1

as far as i know, speakers produce sound from electric energy through the use of electromagnets.

you may be familiar with electromagnets. for refresher purposes, electromagnets are technically pieces of certain metals (usually iron) that induce a magnetic field by making an electric current flow through it in cycles or rotations. by controlling the electric current and the number of cycles, you can tweak the power of the electromagnet itself.

you can make a simple electromagnet by taking a piece of iron nail, then coiling an electric wire across the shaft. when you introduce electricity to the wire, the nail can act as a magnet.

this concept is utilized in speakers in that an electromagnet in the speaker is induced by the electric current from your audio output source. with varying electric current, the electromagnet inside the speaker makes a circular "pad" vibrate rapidly in minute motions, and thus make the air around it compress and decompress; exactly what happens when sounds travels through a medium like air (think sound waves). this is what you then hear.

this is also the reason why when you lay your hand down on an operating speaker, you can feel it vibrating very slightly, and that if you stand in front of a rather large speaker, you can actually feel the air whooshing at you with every bass beat or whatnot.

hope this helped. ^_^

Answer 2

The electrical energy varies in time to the sound information that it cares. This varying current is run through an electromagnet. The electromagnet vibrates a speaker disk at the base of the speaker the vibrating disk produces sound waves by it's physical movement in response to the magnetic field produced by the varying current in the electromagnet.

Answer 3

The electrical energy is run through a coil, which becomes an electromagnet as the current of the sound varies. Another (permanent magnet) is attached to the cones of the speaker. As the sound varies in frequency and intensity, it moves the permanenet magnet, which moves the cone, which causes the air molecules to move...thus sound.

Answer 4

Electrical energy is converted to magnetic energy.

This is used to cause a diaphragm to move, forcing air out of the speaker, as a form of mechanical energy (pressure).

Answer 5

the varying electrical energy is passed through a wire placed in a magnetic field. Due to the electro magnetic effect, the wire starts to vibrate, setting into vibration a diapragm attached to it. These vibrations from the diaphragm cause the sound waves

Answer 6

Speaker consists of two main parts - electrical and mechanical.

Electrical part consists of two subparts - permanent magnet, that produces constant magnetic field in envirnoment, and a coil of wire, wound on the "horn" of the mechanical part.

Mechanical part consists of two subparts - Horn, on which the wire is wound and glued, and the membrane, also glued to the horn, but also glued to the carrier frame.

The wire is supplied with AC of a variabile voltage, that causes variabile curent to flow through the wire. That voltage is induced in an amplifier. Curent flow through the wire in a magnetic field makes the opposite effect to the electromagnetic induction, i.e. it produces motion of the wire, which is directly proportional to the intensity of the curent flow. When the AC is in the "+" phase, the wire is moved toward the magnet, and in the "-" phase, moved from the magnet.

The motion of the wire is transfered to the horn-shaped element of the mechanical part, to which the wire is wound and glued. Motions of the horn are then transfered to the membrane, to which the horn is glued. Motion of the membrane causes air waves, whose frequency is identical to the frequency of the membrane's oscilations. Thus the sound is produced.

OK?

Answer 7

amplified vibrations my friend