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How do speakers work?
Source: | Author:laixaudio | Published time: 2019-10-18 | 800 Views | Share:
The working theory of how do speaker work. Help you understand the design of speakers.
To better understand how a speaker work, we need to feature out these answers:
1. How does human hear the sound?
2. How is the speaker designed?
3. How to make a speaker play a different sound?

Throughout this article, you will find out the answer.

Sound—the Vibrations In the Air

The structure of the human's ears is complicated. But we just need to know that the sound we hear is actually the vibrations of the air.
That's why sound can't spread in a vacuum, because there is nothing to vibrate.
Therefore, as long as we can simulate the vibrations in the air, we can simulate the sound made by any objects in this world.

Coil—Simulating Vibrations

In order to simulate vibrations, we just need to move something regularly and quickly. 
The coil inside a speaker can do this perfectly.
It is actually an electromagnet, which has a magnetic force depends on the power input. 
Therefore, together with a permanent magnet, if we can shape the electricity power to be an electrical signal, we can control the vibrations of the coil. 
A cone attaching with the coil will shake with the coil. It pumps the air surrounded to create the sound and finally, the sound goes to your ears.

Amplifier—Enhance the Signals

Now we know that a speaker works with electrical signals. But how to make it happen? 
The audio data are stored on USBs, transferred by Bluetooth or some other things. They are called Digital Signals. 
After converting into an Analog Signal, they become an electrical signal but still not powerful enough. 
If you use this signal to push a speaker, you are most likely to hear nothing. 
The amplifier is the component that enhances these audio signals using power from the wire. 
The amplifier can be integrated into a speaker like SP-W9, or be separated like LX-360.



Conclusion


1. The speaker shapes the air to simulate sound because what human hear is actually the vibrations in the air. 
2. The speakers are pushed by electrical signals, so it can know how to move the coil and cone. 
3. The electrical signal is the enlarged signal by the amplifier.

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