Tech

How Do Wireless Speakers Really Work?

More than a million of the people in this world are music a holic. No matter how young or old you are, your favorite music will please you in many better ways. Music can easy out any situation. But what if you connect an earphone, and all the wires toggle up? What will be your feeling when you buy new speakers for your home, but the wires form a net on the floor of your room?

This situation forms a mess note than a pleasurable condition. But science has an answer to this problem as well. Your music system can become a wireless system now. Where you can enjoy the music with no interference from the wires.

Astonishing, isn’t it? It is amazing. Considering that how science has answers to everything that causes discomfort. So, what’s new in this article? We will discuss how this wireless sound system works practically and what pros and cons does it has.

Basic Speaker Mechanics:

Before going into how the wireless speakers work, we need to study what is the mechanism behind the functioning of a basic speaker.

  1. Diaphragm:

The diaphragm is the flexible sheet on the outer side of your speaker. This sheet vibrates to produces sound in the surrounding air.

  1. Magnets:

There are two types of magnets in an orthodox speaker; the first magnet is a permanent magnet which sits behind the voice coil, while the second magnet is an electromagnet which is attached to the diaphragm.

The electromagnet is a temporary magnet, which is just a conductor, upon which an electrical wire is coiled. When the electric current is passed, the voice coil acts as a magnet, and formation of north and south pole happens.

With the change in the direction ofthe current, the north and south pole location is altered. The similar poles repel each other while the opposite poles attract each other.

The speaker mechanism acts on the current shifting. When current direction is changed, the poles change, and the voice coil is either repelled or attracted by the permanent magnet. Since the system’s voice coil is attached to the diaphragm, vibration is created by either pulling or pushing the cone.

All the currents passed into the wires are first passed through the amplifier.

Need a light:

The wireless speaker sare not directly connected to the stereo system. So, there must be some way to give the speakers a signal to pass current in the right direction. There are a few ways to drive the voice coil inside the wireless speakers.

The stereo system has a transmitter, which transmits the infrared beam. This mechanism works just like the remote controller which sends signals to electrical devices. The infrared ray is not visible, but it is there.

The fluctuations are received by the transmitter in the stereo system, and the fluctuation is converted into an infrared ray. This infrared ray has all the relevant information that the speaker needs. Once transmitted, these rays are thrown on the sensors built on the speakers. The infrared rays can carry millions of fluctuations per second.

The sensor which receives the infrared signalssubsequently sends an electric signal to the amplifier. This amplifier intensifies the electric signals and sends them to the voice coil. The voice coil is then rotated to produce sound.

One of the major drawbacks related to the infrared system is that the line of sight developed between the source and destination must be maintained. In other words, any obstacle between the stereo system and the speaker will render the sound in to complete silence.

Another problem is the interference caused by the infrared radiations from different sources. Almost every device uses the infrared technology, either it is a remote control or something else. A whole lot of signals getting involves may cause an interference in the sound produced by the speaker.

Broadcasting signals:

The broadcasting signals work on the electromagnetic waves. The visible light which we see varies from the wavelength of 350 nanometers to a wavelength of 750 nanometers. The infrared rays have a greater wavelength than the visible ones. The electromagnetic waves are one of the infrared waves but have a wavelength of several kilometers as well.

The radio waves are better than the other waves in many waves. But it requires some other additional components to generate radio waves. The transmitter receives the electric signal from the sources and converts it into pulses. These pulses are then thrown out from the antenna to the whole surroundings.

An antenna or receiver on the speakers catches the radio waves and converts it into an electric current. This current then passes through the amplifier, which intensifies the electric signal.

The radio waves have several frequency levels. The frequency is the number of waves that pass through a unit area in a one second time. If the wavelength is long then the frequency will be low and vice versa. So, it is better to use different frequencies in the broadcasting system, because the similar wavelengths can cause interference.

The modern devices use the radio wave technology frequently. And this is the reason why the government usually has a defined frequency range for a specific device. This frequency difference can assure and interference-free transmission of signals from the source to the destination.

The frequency of the signals generated in the wireless speakers is usually between 902 and 908 megahertz. This range is subject to the USA and can be a little different in other countries.

Bluetooth:

The Bluetooth is the most modern and the newest technology in the world of wireless speakers. The best wireless Bluetooth speakers allow you to exercise more controls on your speaker that just the volume or the power.

The communication between the source and the speaker is two way. You will be able to control what soundtrack you are playing and what radio station your system is tunedinto. So now changing the channel is not such a big issue.

This system includes the least amount of interference and allows the consumer to enjoy the highest quality of musical beats.

About the author

Maria Zahid

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