To understand how speakers work, first need to understand how sound works.
Inner ear is a very thin skin membrane called the eardrum. Continuously variable pressure in the air will affect our eardrums to vibrate. When the eardrum to vibrate, the brain will translate these vibrations into sound. That's how people hear.
An object when it creates sound vibrations in the air. When objects vibrate, it makes the particles move in ambient air. Gas particles impact on the gas particles to move next to it, which carry impulses from vibrations transmitted through the air to the human ear.
According to the above, the object has sent a wave of vibration through the air vibrations, and when this vibration to the human ear, it will make the eardrum vibrate. Brain will translate this into sound vibration of objects.
People hear different sounds from different vibrating objects by the following factors:
Frequency sound waves - high-frequency sound waves is simply the air pressure to speed ranges in a certain period of time. The brain will interpret these vibrations as sound high. When is a period, but less so than the vibration, sound will be lower.
Level atmospheric pressure - This is the amplitude (magnitude) of sound waves, determines the volume of sound. Sound waves with greater amplitude will make the eardrum vibrate more strongly, that the brain will interpret this sounds louder.
There is a device that works similar to the human ear, which is the microphone used for recording. It also has a vibrating membrane by sound waves in certain environments. Sound waves from the microphone will be encrypted and stored in magnetic tapes, CDs ... in the form of an electronic signal. When these signals are sent to the speaker, the speaker will translate into physical vibrations of the speaker membrane. The speaker quality is usually designed so that optimum physical vibrations of the diaphragm speaker will reproduce sounds almost intact from the microphone.
Sound
Speakers, basically, is a compiler back-end operations with microphone. Speakers electronic signals in the storage medium into mechanical vibrations to reproduce sound waves that resemble sound waves from one microphone.
The essence of traditional speakers often include one or more of the speaker (or "old speakers - driver).
Loudspeaker membrane (diaphragm)
Human speakers generate sound waves by vibrating loudspeaker diaphragm (cone or diaphragm) at high speed.
- Membrane speakers are usually made from paper, plastic or metal, which is attached to the rim width rim hanging (suspension).
- Borders suspended, or ring the speaker, is a ring with stretchy material that allows movement in the cone membranes. Hanging edges are attached to metal frame of the speaker (basket).
- The narrow rim of the diaphragm cone speakers are connected to voice coil (voice coil).
- Scroll negative association with a metal frame with spider (spider) which also is a ring with elastic material with the task of keeping the coil negative is always in the middle position but still allow this movement to roll out.
For a certain number of speakers, the speakers are built with a membrane roof (dome) instead of cones (cone).
Voice coil
Negative roll is actually an electromagnetic magnet.
Magnets are electromagnetic coils wrapped around a core metal (usually iron). When electric current runs through the coil generates a magnetic field around the making of iron are magnetic. This is similar to magnetic field around permanent magnets, also including North and South poles and metal smoking. Unlike permanent magnets, electromagnets from the people of North-South polarity reversal could reversal by electrical current.
Wires from the sound system with speakers will be joined by two connectors on the child. Photo: HowStuffWorks.
This mechanism is similar to the way of stereo signals, and electronic reverse through two consecutive red black connector already very familiar to anyone or to connect the speakers.
Basically, the amplifier (amplifier) is continuously changing electrical signal, fluctuating between the positive and negative lines of the red wire. Always run by electronics in one direction between the anode and cathode, current flows through the speakers also reversed continuously forming alternating current. AC This in turn will cause magnet polarity reversal from many consecutive times per second.
Magnet
Here is how that power fluctuations can cause the roll motion in the negative. Electricity from magnets placed in a magnetic field of the fixed permanent magnet. Two magnet (electromagnetic and permanent) interaction of two magnets together as usual, opposite attraction, the same sign repel each other. When the poles of the electromagnet changes, eg from the cathode to the anode creates a magnetic attraction to the cathode to promote the permanent magnet. This impact force causes coil sound on the move constantly oscillator similar to a piston.
When moving coil sound, the speakers should be associated with the membrane will also move in the membrane. Speaker diaphragm motion causes the front speakers are air vibrate, thus creating sound waves. Electronic signals can also be compiled into a waveform, in which frequency and amplitude of this wave will impact electronic and voice coil motion control the rate and distance. Because electromagnetic waves are encrypted form of the original sound waves to move the speaker membrane the rate and distance in turn will create the right sound wave frequency and amplitude with which it has been encoded.
The size of the different speakers are designed to cater to the specific frequency range. Usually a frequency range of speakers will be broken down and is reflected by the many different speakers.
