How Do Earpieces Work?

Can not get over how economical the radio accessory is now, an incredible deal for any top-end product!

To put it very simply, your earphone includes a piece of plastic that vibrates in accordance to the signals received from the device it’s attached to. The plastic moves due to a metal coil that’s attached to a magnet, which allows the plastic to form the sound waves that pass into your ear.

That’s it, really. It seems easy enough, but I couldn’t have thought of it.

Jezen Thomas at eHow.com provides a more detailed explanation to us, he says that,

“Earphones consist of a speaker cone, an iron coil, a magnet and speaker cables. When earphones are plugged into a music-playing device like a stereo, electricity is sent along the speaker cables. The speaker cables feed this electrical current through the iron coil, which behaves as an electromagnet. The coil then attracts or repels the permanent magnet, depending on the electrical current sent by the music-playing device. This causes the coil to move, which subsequently pushes and pulls the speaker cone. As the speaker cone vibrates as a result of this movement, it creates sonic waves that resonate through the air and are transferred through small bones and membranes inside your ear”.

Of course, there are different types of earphones, but basically, that’s it.

Some earphones, however, do feature additional functions. Noise-canceling headsets, for example, can generate a small field of white noise around the speaker itself, which acts as something of a vacuum and has the effect of disabling outside noise. These headphones are also better for the health of your inner ear than most other types. Sam Costello at About.com writes,

“The noise around us can contribute to cause us to change how we listen to an iPod. If there’s a lot of noise nearby, it’s likely that we’ll turn up the iPod’s volume, thus increasing the chances of hearing loss. To cut down on, or eliminate, ambient noise, use noise-deadening or –cancelling headphones. They’re more expensive, but your ears will thank you”.

Chris Woodford, writing for ‘Explain That Stuff.com’, gives a detailed description of the main differences between earphones and speakers. Despite essentially operating in the same way, there are variations between the two, it seems. He says,

“The biggest difference between loudspeakers and headphones is, of course, size. A loudspeaker needs to set all the air moving in a room so you can hear the sound it’s making, but the speaker in a headphone only has to move the volume of air inside your ear canal. That’s why it can be so much smaller and more discreet”.
If, even after all this tech talk, you’re still interested in seeing what’s going on in your headphones, the Youtube user Cayde Brown has a series of videos called ‘Take Apart’, which will probably be of interest. In one episode, Cayde takes a pair of headphones apart and shows us exactly how they work.

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How Ham Radio Can Benefit Kids As Both A Hobby And Educational Outlook

Without giving too much about this earpiece piece, but I found it remarkable and relevant to what I’m now doing.

The need to communicate is one of the most basic urges of the mankind. In fact, it is this urge that causes us to become the dominant life form on our planet. Thus, since the dawn of time, mankind has used alternative means of communication whenever possible. Of course, as the technology has progressed, communication has taken on different forms. Perhaps, one of the most popular forms of communication is by using ham radios.

Ham Radios require a license, which forces the student to undergo radio theory and principals, while at the same time making the hobby fun. This often wets the students’ taste to such a degree, that they are often motivated to work towards a high paying technical career, such as an Electrical Engineer or RF Broadcast Engineer.

Ham radios are special that in order to perform well in the hobby, you need to fully understand the electrical and radio frequency concepts involved. Ham Radios are designed to be used over long distances by using wireless communication. The essence of ham radios are radio frequency transmitters that were used to send radio signals over long distances. Hence, ham radios are analogous to short wave radios which allow you to communicate over long distances. In essence most short wave ham radios start working just above the AM range and they go up all the way to citizens band. In essence, ham radios start to operate just above 1.6 Megahertz and they end up working all the way up to the 27 MHz range. Of course, in the morning, higher Megahertz ranges may be preferable, while at night the lower frequency ranges are more popular.

In principle, the radio waves of ham radios have short wavelengths, but high frequencies which cause them to be packed with energy. They bounce of the ionosphere instead of being absorbed and as a result, this causes them to be able to travel to long distances. In fact, you may be surprised at how easy it can become to communicate, as you would be able to talk over long distances. It is not that surprising to talk over long distances with ham radios such as around the country, overseas and even across oceans. In some cases, you can also use ham radios to communicate with astronauts in the space station.

The use of the Ham Radio Equipment itself requires an understanding of concepts radio frequency technology as well. Ham Radios are as ever complex as govt and often at times as technical as maintaining a braodcast station. The Icom IC-706MKIIG for example has hundreds of controls for both the transmit, receive, and audio characteristics of the signal. The Icom IC-706MKIIG is one of many such complex gear used by Amaeteur Radio Operators.

Hence, you can use the ham radios for all kinds of amateur communication needs both for educational and entertainment purposes. You can use ham radios to further your education by speaking with people from different places. You can easily speak with other persons who speak foreign languages. Let’s say that you are learning Spanish or French. Then you can easily find other amateur ham operators overseas who will be able to speak French or Spanish with you. Thus, it is possible for you to advance your foreign language skills. Moreover, if you are interested in a certain profession, you can easily find people of that profession and talk to them over a ham radio. You will be surprised at how open ham radio operators can be with each other as you will be able to get the help and the assistance that you need.

Moreover, speaking with other ham operators can be fun, as you would be able to meet multinational people all over your country and all over the globe with a ham radio. Especially for teenagers, there are special days in which teenagers everywhere will listen on their ham radios.